Warren is probably the best one to watch from imo. Pavillion has some good bits too but Warren is a longer stage and there's some cracking stuff if you don't mind a walk from the parking.
Yateley isn't run anymore as most of the land has been cleared (quarrying?) but I heard there was only a couple of miles of the original stage route left and it wasn't worth the fee to the forestry commission to run it.
Couldn't agree more about Rushmoor Arena, mickey mouse stage and not worth it. The non-spectator stages have always been Ash and Longmoor which have some good viewing on if you know where to go
Would definitely be going this year if it didn't clash with Modified Live
