>>14898974 people in one van will be a bit of a tight squeeze. If your budget allows maybe get 2 vans and go 2 people per van, unless all 4 of you plan on sweating into each other's armpits every night for 2 weeks.
So you guys dont go stir crazy make sure to spend a good chunk of time outside of the van and have a plan for rainy days (like a tarp you can hang off of one side of the van or a back-up hostel if there's bad weather)
Like
>>1489979 says, have some basic cooking gear like a small gas stove so you can cook your own food on the road. You dont need to refridgerate anything really. Get UHT milk, mac n cheese, bread, some veggies like potatoes carrots onions and mushrooms keep really well without refrigeration.
>>1490180this.
I used to live in a house where we had 12 people living in 3 bedrooms. Even with 2 bathrooms and a large kitchen it was impossible some days to get time in to cook, shower and shit.
OP what's your plan for showering, are you guys taking a camping shower with you? Gunna hang a bag from a tree? Swim in rivers/lakes?
Have you scouted out where you're gunna park your van in advance? Keep in mind that you likely wont be able to just pull up inside Yellowstone and sleep there.