Packet meals are great. They're also expensive (around $14-18 per Backcountry pouch in Australia), and after a week of butter chickens and roast lambs the appeal wears thin. The alternative most serious hikers eventually arrive at: dehydrate your own food at home, vacuum-pack it, and rehydrate at camp.

Done well, you save serious money, eat better, and dramatically reduce pack weight (a typical meal goes from ~700g fresh to ~150g dehydrated). Done badly, you eat soggy beef jerky-flavoured rice. Here's how to do it well.

Photo by K8 on Unsplash

You can dehydrate in a regular oven at low temp, but the results are inconsistent and you can't run it for 12 hours without burning power. A proper dehydrator pays for itself in 6 months if you hike often.

What to look for:

• Opaque or non-transparent walls — light destroys vitamins and discolours food. The clear-plastic units in supermarkets are convenient but worse for the food
• Adjustable thermostat — different foods need different temps: ~34°C for herbs, 50°C for vegetables, 60°C for meat. Fixed-temp units force compromises
• Timer with auto-shutoff — multi-hour cycles you can leave running while you sleep
• Multiple trays (5+ minimum, 9-10 ideal) and at least one solid sheet for liquids/purees
• Detachable trays that go in the dishwasher — you'll be cleaning them constantly

Brands worth the money: Excalibur (US-made, 9-tray, the long-time standard), Sedona, Sunbeam DT5600 (cheaper Aussie option that does the basics well). Budget around $200-500 for a unit you'll have for a decade.

• Only use as many trays as you need — empty trays waste airflow and slow drying time
• Lightly oil the solid sheets with vegetable oil (after washing) — stops fruit leather welding itself permanently to the plastic
• Preheat for 10 minutes before loading — gets to operating temp faster and food dries more evenly
• Don't interrupt the cycle if you can help it — re-cooling the food adds hours to the drying
• Sharp knives matter — consistent slice thickness = consistent dry time. An electric knife is genuinely useful here
• Always date your bags. Dehydrated food doesn't go off in days but flavour fades over months. Rotate stock
• Store in a dark cupboard — light degrades dried food fast
• Cool completely before storing — warm food + sealed bag = condensation = mould

Photo: K8 / Unsplash

Different foods, different shelf lives:

• Herbs — 1-2 years in dark, dry storage
• Vegetables — 6-12 months at room temp; longer if vacuum-sealed
• Fruit — 6-12 months
• Meat — 1-2 weeks at room temp; 1-3 months if vacuum-sealed; years if vacuum-sealed AND frozen

For trips longer than a week or in hot/humid conditions, always vacuum-seal. A cheap vacuum sealer ($80-200) pays itself off after a few trips. Without vacuum sealing, oxygen and humidity slowly turn fats rancid — especially with meat.

For multi-week expeditions, vacuum-seal AND freeze until the day you leave. Vacuum-sealed frozen dried meat keeps for years.

• Lean meat only. Fat goes rancid as it oxidises — and there's no way to vacuum-seal that completely out. Use eye fillet, top round, lean mince. Trim ALL visible fat first
• Blot oil during drying. Even lean meat releases some oil — paper-towel the trays at the halfway point
• 60°C minimum. Lower temps don't kill bacteria; higher temps "case-harden" the surface and trap moisture inside
• Mince is great — easy to dry, easy to rehydrate, perfect for spag bol or chilli
• Store cool and dark. Fridge or freezer is ideal until trip day

Beef mince + tomato sauce + onion + Italian herbs, dried into "bolognese leather" then rehydrated with hot water + cooked pasta = restaurant-quality hiking dinner for $3 per serve. Genuinely.

Photo: Eric Prouzet / Unsplash

• Eat-it-raw veg can dry as-is. Capsicum, mushrooms, tomatoes, zucchini, courgette, spring onion — slice thin, dry, store
• Veg you'd normally cook need a quick blanch first. Corn, peas, broccoli, green beans — steam for 5-8 minutes before drying. They rehydrate dramatically better
• Skip the blanch if you'll boil-rehydrate. If your method is "add boiling water, leave for 10 minutes" then 1 minute of boiling water does what blanching would have done. Skip the step
• Steam corn before drying always — raw dried corn never properly rehydrates and stays gritty
• Frozen mixed veg works well — dump it on the trays straight from the freezer, dries in 4-6 hours

Three to start with — they're foolproof and they teach you the technique:

Beef bolognese: cook the bolognese as normal at home, spread thin on a solid dehydrator sheet, dry at 60°C until brittle (8-10 hrs). Crumble into a vacuum bag with a portion of dried pasta. Camp method: boil water, add bag contents, simmer 5 mins.

Hummus + crackers: spread hummus thin on a solid sheet, dry at 50°C until cracker-crisp (6-8 hrs). Snap into pieces. Eat dry as a snack, or rehydrate with a few drops of water and olive oil into a paste.

Apple chips: slice apples 3-5mm thick, dip in lemon-water (stops browning), dry at 55°C for 6-10 hrs until leather-firm. Snack of the gods.

Dehydrating is the rabbit hole that turns occasional hikers into trip-planning food nerds — and that's a good thing. Once you've eaten a proper home-made dehydrated bolognese on a 5-day hike, you don't go back to packet pasta with a strange smell.

Buy a quality dehydrator, start with vegetables (easier to learn on), graduate to mince-based meals, and within a year you'll have a freezer drawer full of vacuum-sealed bags ready for any weekend trip.