You seem to have done the legwork!
We shoot at B&G tournaments - nice club, nice folk, definitely worth a look.
Cheltenham same as - have a word with andrew.paterson of this forum (he's the tournament organiser there) and let him tell you how wonderful their new ground is
Attached to Cheltenham racecourse and "large enough to hold a target tournament and a clout at the same time".
I have shot with members of the other clubs you mention, and they are all typically friendly archers, but I don't know their home grounds so can't compare.