when i had my estate car, i could carry 250 L of water, my cart, all my poles, my trad kit
it works and it works well
i then got a VW T4, which was nice and big, i carried the same stuff in it, just had loads more space around it, then onto a VW caddy, i still carried the same stuff in it
then onto my berlingo, i fitted a 400 L tank in it and ditched the 25 L barrels, i still use my cart and still carry the same kit