I think both the Ham and the Bowd marquees are pretty heavily used most of tne day. (And the Bowd is far too far out to be a good concert venue - the only people who'd get there would be campers.)

Bringing back the wet-weather marquee at the Arena might make a lot of sense. And they need to sort out the arrangements for stopping the walking areas turn into muddy morasses when it rains, because that is teh problem. With a brolly and a waterproof to sit in watching a performance in the rain isn't such a big deal, and the stage area is roofed in these days. But the mud is, and it's not that hard to prevent it becoming a major problem.