I have used first a VW bus, then this BIG Dodge van with switchable, removable seats. I collect 'stuff'...foam, mattress pads, ice chests...etc...anything to make my life easier when I park. I have almost everything I need except a bathroom, and I have learned to investigate THAT situation as soon as I park.(and a plastic bottle for REAL emergencies and when rain makes a hundred dash unpleasant)

I have pulled into big truck stops on the interstate and and parked way in the back, pulled my curtains, and slept just fine. I carefully make sure I won't be in anyone's way.

I arrange the van so that I can move back & forth from bed to drivers seat without opening doors...just in case..(rain, bugs, animals...etc.)...and I always have flashlights, drinks, maps, handy...and EXTRA set of keys! Also, I have a set of rain gear and umbrella that never leave the van....oh...and some sort of flasher/marker when I need to be seen!

I, too, have gone to a conference and been unhappy with the setup (amazing snoring!), and switched back to the van in the middle of the night with almost no hassle.

Haven't done a lot of this for a couple years, and I suppose there are things I've forgotten....but I used to sleep in the van at the Getaway to avoid the snoring.