Jason, This is a hard question to answer. But know you will find after a few trips what is "have to takes" and what is " leave at home". But only "you" can really determine that. What makes your family comfortable while camping? The first few trips I drug it all with me but learned that if I didn't use it on a 3 week trip, I probably would never use it so why drag it around? We all have our own wants and needs. Personally I wouldn't leave the driveway without clothes ( I like clean clothes) clean sheets, fresh pillows, towels and a coffee pot. Others could care less about any of that and can get by with an old musty sleeping bag. Of course there are must have's like a Flashlight but I really don't even use a flashlight all that often so it's only there for emergency's. But for you it may come in handy every trip. Because each trip for us, is different I keep things like toasters for example, both electric and campfire, stored in an area of our barn ( it's really a big building and not a barn) if we are going to be in a campground/rvpark with hook ups the electric toaster get's put in, if we are going to be dry camping
the campfire toaster gets put in, that way I am not dragging things each and every trip that are not needed for that particular trip. But I have that luxury because of the barn and that's probably not feasible for everyone to be able to change out the trailer by trip needs. Personally I need to learn to cut down on what I take food wise, we would never end up eating all that food I take. But I never want to Not have enough. LOL. That's why I say, only you can decide what works for you. But will try and suggest a few things that are always in the trailer.
Silver ware and utensils, pots and pans ( though some of those get changed out per type of trip) For me there is no use to drag along electric skillet or crock pot when we are gonna be dry camping
. And why drag a heavy dutch oven if we are gonna be with full hook ups resort type place for the trip?
place setting for each of us
Paper plates and cups ( just a few of each)
First aid kit
, and that's about it. But add lot's of stuff for the type of trip we will be taking.
As for what always ends up in the truck,
Tools ( though limited cause I will just call someone to fix what needs fixin)
Jack, and that's about it. Of coures it gets loaded up with the trip "needs"
Good luck figureing it out, cause I don't think most of us have. People either take toooooo much or learn to live without. But don't think there is the perfect answer. Just learn to have fun no matter what you forgot to take along.