i have a pug partner, same as berlingo...i think lol
theres 2 types, one has a 600kg payload and the other a 800, mine is the 800 and its a great van
i have never had a problem with it, i have a 400 litre tank in there, and all me other bits, and it pulls it never with any problems, you harldy notice the weight you have in there to be honest
my 24ft pole fits straight in with no problem, not diagonally, straight in, and i could get much bigger on there to!
go with the berlingo mate, i have the 1.9 diesel, great on fuel even with the weight!