In reply to David Coley:
You'll be fine David. Wilton 1 is owned by the BMC so you don't need to worry about shooting. The gun clubs own Wiltons 2, 3 and 4 but climbers have priority on Saturdays. Plenty to do and should be in reasonable nick.
You may find shooters in 2, 3 or 4 on a "climbers priority" day (I found some in 2 once) but when approached politely they're very reasonable, acknowledge that we have priority, and just asked for 15 mins to pack up.
Cheers
Paul