I'll do you one better . . . if you send me an Email (not a PM) with your question (and BR&P) in the Subject, I will request permission from two of our wheelchair bound members (both named John) to give you their Email addresses or forward your Email to them (their choice) for a response from people with the first-hand experience.
That said, I'll offer an opinion on BR&P, but given that I'm lucky enough to not need a wheelchair, I may well mis-interpret your issues.
- New clubhouse (other than the office upstairs) is totally handicapped accessible. Bathrooms, one shooting station on the far right, access to the building with HP spaces in front (but we have many HP people so you may not get to park real close), there are no steps to get into the building.
- Old clubhouse: my guess is that neither bathroom would be accessible to a wheelchair. The indoor range probably would be accessible . . . either John should be able to answer that. There are steps from the rear of this building (no go for wheelchair) but no steps from the front of the building.
- Outdoor ranges: rifle range and far right pistol range are easily wheelchair accessible. Middle (25 & 50 yd) pistol range would be wheelchair accessible only from the right side (2 steps on the left end). Now personal opinion on the rifle range is that you probably would not be able to change targets yourself . . . it is frequently muddy, deep water after a rain and the 100yd targets are difficult to reach if you are shorter than 5'6" off the ground. I'd make sure someone is either with you or someone else is shooting on the rifle range and just ask them to hang targets for you . . . we're a friendly bunch and I can't imagine anyone refusing to help you with that. Even putting up targets on any of the other ranges might need help and at least one RO has to be on duty and any of us should be more than willing to help you, just ask.