BUGGING IN

How to Stock a 90-Day Bug-In Supply Cache for Your Home

Water, food, power, medical, and communications — the complete home inventory for 90 days of self-sufficiency when the grid goes down.

Bugging out sounds like a plan until you’re actually on the road. Traffic gridlock, fuel shortages, unknown terrain, and the wrong weather can turn a bug-out into a death march. Most experienced preppers default to bugging in for most scenarios — and the reason is simple: your home is already stocked, fortified, and familiar. A 90-day supply cache means that even in a prolonged grid-down event, you’re not desperate. You’re waiting it out in comfort while everyone else is scrambling. Here’s exactly what that cache looks like.

Water: The Non-Negotiable Foundation

One gallon per person per day minimum. For a family of four over 90 days, that’s 360 gallons. Store as much as you can in BPA-free 55-gallon water barrels in a cool, dark location. Layer in a gravity-fed Berkey-style filter that processes up to 6,000 gallons on one set of filters — this handles rain collection, stream water, and any tap water that may be questionable during a crisis. Set up rainwater harvesting off your roof as your ongoing replenishment source. Rotate your stored water every 12 months.

Food: 90 Days Calorie-Dense and Shelf-Stable

Build your 90-day food cache in layers:

• Layer 1 — Everyday rotation foods: canned goods, dried pasta, rice, oats, peanut butter. Eat from this and replenish. 30-day supply minimum.
• Layer 2 — Sealed long-term storage: 5-gallon Mylar bucket food packs with oxygen absorbers. See the 25-year Mylar bucket packing guide for exactly how to do this right. 60-day supply.
• Layer 3 — Freeze-dried protein and vegetables: freeze-dried meat and vegetable cans with 25-year shelf life. These are your reserve, not your daily rotation.

Target 2,000 calories per adult per day. Full 90-day emergency food storage breakdown here. Don’t forget cooking: a propane camp stove with a 6-month fuel supply and a wood-burning rocket stove for when propane runs out.

Power: Keep the Critical Systems Running

You don’t need to power your whole house. You need to power your survival systems. A 1500-2000Wh solar generator paired with 200W solar panels handles communications charging, medical devices, lighting, and a 12V chest freezer. Read the full solar power system guide and the bug-out location solar sizing walkthrough to dial in your exact needs. Keep critical electronics in a Faraday cage when not in use — EMP is always a threat during major grid-down events.

Medical: Your Home Is Now the Hospital

With hospitals overwhelmed or inaccessible, your bug-out medicine cabinet becomes your primary care facility. Stock a 90-day supply of all prescription medications. Your trauma kit should handle severe wound care, fractures, and burns. Add over-the-counter antibiotics, electrolyte supplements, a manual blood pressure cuff, and a pulse oximeter. Take a Stop The Bleed or Wilderness First Aid course before you need those skills.

Communications: Know What’s Happening

Cell towers go down. Your off-grid communications plan must be radio-based from day one. GMRS handheld radios for local coordination, a hand-crank weather radio for incoming broadcasts, and a GMRS mobile base station if you have your GMRS license. Keep all backup radios Faraday-stored.

Security: Protect What You’ve Built

A stocked home in a grid-down scenario is a target. Your home fortification guide covers the physical hardening. Layer in perimeter security for your bug-in location: motion-activated lighting, door and window reinforcement, a watch schedule, and trusted neighbor coordination. What you’ve built is worth protecting.