Think of ways to keep cool.
Yep, can’t stress this enough. Unless you’re parked up in the shade, vans really soak up heat from the sun in the day and release it all night, even sleeping with the side door open can be really hot and uncomfortable, getting as much breeze through as possible is absolutely key.
I’ve suggested these before, but I’ll do it again, the latches that you can get so you can lock the rear doors in an open-but-inaccessible position make a real difference.
(This is from experience of an April – Sept roadtrip through Europe in a silver T5, from Norway to Romania and most countries in between)