We tow with a car but the only things I worry about are electronic stuff and my handbag. If the rest gets stolen, then good luck to the thief. I don't have any designer gear and although a blow, I can replace a table and chair if I have to so I don't sweat the small stuff.
When you say van, which one do you mean? ;)
If you're worried about clothes, then keep some in the caravan and some in the campervan.
Pots and pans go where you cook.
The rest is probably a question of where you can fit it and weight distribution.
That's my inexperienced input. I'll probably find myself hungry and nekked next time we go away LOL