One thing I am sure of is that keeping the spec simple gives maximum flexibility. Using crates and a portable 12v coolbox means you can load and unload the boxes in the kitchen at home. The van stays loaded in the summer minus clothes, food and water ready for a quick off whenever we want.
Here's a few pictures of recent camps and days out:
West Wet Somerset
West Wittering
Preston Park Brighton
Newhaven
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Ashdown Forest