Hook-up supplies to keep in a pop-up trailer include a water line hook-up, a sewer hook-up, a back-flush hose and a replacement water filter. It's a good idea to keep a small tool kit, disposable gloves and rags on hand as well.
Extra sheets, blankets and -- if your space allows -- an extra pillow or two should be kept in the trailer. Bath supplies to keep on hand include toilet tissue, a toilet brush and bathroom cleaner. Extra hand towels, a bar of soap and shampoo are small supplies you should keep in a pop-up trailer. A first-aid kit should always be stored in the trailer. Some items you shouldn't keep indefinitely include lotions and sunscreen, as the consistency of these items can change when exposed to extreme heat and cold.
The trailer cargo space is just the place to keep outdoor supplies, such as entry steps, a doormat, flashlights with extra batteries, a battery-operated lantern and lawn chairs. Other outdoor supplies you can store in your pop-up trailer are fire-starting materials, bungee cords, propane and a hatchet or saw for firewood. Compact items to include are citronella candles and mosquito repellent; keep these in a plastic container to suppress the citronella odor.
Miscellaneous supplies to keep in your pop-up trailer include the trailer owner's manual, maps and campground directories. Kitchen utensils, including pots and pans, can be stored inside the trailer. A portable radio with extra batteries, a couple of decks of cards and small board games are easily stored. Other small supplies to keep on hand are magazines, books, an address book and stamps for post cards.
