Hello and welcome to our merry band of RV'ers!
Start off with a couple mini-trips...work like trial runs & helps identify what everyone likes in their personal space. Make it a game...you didn't mention if your gang of kids have ever camped before...?
Keep the basics in your RV. Makes packing for each trip easier.
Here is our check-list. Feel free to modify depending on length of trip, focus (fishing, skiing, boating...vegging) !!!
Bathroom: TP, baby-wipes, barsoap, shampoo, conditioner, lotions, razors, washcloths/towels, toothpaste/brushes, hairbrush/comb, tmpx, nail clippers, tweezers, band-aids, antibiotic ointment, alcohal, sunburn ointment, kleenex. Optional: hairdryer, make-up.
This sounds gross: but train everyone as to what goes into the RV sink/toilet and what does not.
Medicines: any Rx for your gang, good first-aid kit, mosquito repellant, aspirin/ibuprofin.
Bedroom: pillows, sleeping bags, extra blankets, favorite stuffed critter (5-year-old).
Every body: shoes, flip-flops, hiking boots, socks, jeans/shorts, t-shirts/sweatshirts, undies, swimsuit, PJ's, rain-gear, sunglasses, sunhat, good books, hand-games, cel phone.
Kitchen: figure out your meals and pack the stuff (pots, etc.) you need to prep. I organize by breakfast/dinner/supper.
Pack that fireplace lighter/matches. Paper plates/disposable glasses, cutlery, trash bags, aluminum foil, large/small freezer ziplock bags. Cutting board and all-purpose knife. Dish soap/sponge, dish-towels/paper towels. Jugs of water!! Ice chest for sodas, beer, water, whatever...keeps the RV fridge open for butter, eggs, bacon, bagels, cream cheese, milk, OJ, whatever.
Marshmellows/choc bars/grahm crackers, salt, pepper, hot-sauce, oatmeal/brkfst cereals, bread, COFFEE, sugar, ICE, trail-mix munchies.
Misc: flashlite, walking stick, daystyle back-pack, binoculars, camera, maps, all-purpose cleaner, duct tape, general purpose rope, level bubble/leveler materials, drinking water hose, black-water dump tubing, plastic bucket, disposable gloves...
Outdoors: BBQ, lawn chairs, out-door tarp/rug, firewood, newspaper...matches.
If bringing a pet: leash, food, water/food dishes, sleeping bag, couple extra towels...
Finally: sense of humor, good-will, credit card, ID, and some cash.
Have the time of your life...ok?! Cheers!