Your BCN would not consider it a frivolous question - ask her about anything affecting your recovery.
I think you are probably right that it is too soon to drive yourself to Bakewell Show - but you know best how you feel on shorter drives and what the roads are like.
I am waiting to see an oncologist on 13th August - I just want the next phase to start asap, so it is over asap!
Waiting for results is always very unsettling, your BCN and surgeon know you will be nervous when you meet them and should respond accordingly. Have someone with you - whatever the results, it is very, very difficult to take it in at the time, another person can help 're-run' the things you don't absorb at the time. There is a section somewhere on this forum for those of us Waiting for results, if you could do with a virtual 'me too'.
Hope all goes well for you.
Debtex, I also had a WLE and SNB, on 4th July. I used to ride (wish I could have kept it up) so I have some idea of the kind of movement involved.
I was driving shortish distances from just over a week after my op, with no problems. Two weeks after my op, without giving it a thought, I agreed to meet someone three-quarters of an hour drive away. Mistake! Although it was nearly all on smooth-ish roads, I guess partly because my car has sporty suspension (know about every bump) I was desperately sore on the way back - and very, very tired, probably not fit to drive by the time I got home. A month after the op, I still have a little swelling under my arm and have only in the last week been able to wear a proper supportive bra all day - essential for riding!
I advise more patience than I showed - maybe walk leading your pony, do some extra grooming (perfect exercise for the arm and shoulder, I would think), give your tack a deep clean - wear gloves for that. There is something very special about spending time with a horse, you are very fortunate to have that option.
Oh, and I agree with the Mod., post in the Surgery section too.
There are a number of ladies on this site who ride, and have started to ride again after surgery. Hopefully one of them will see your post now and get back to you. It might be worth your while posting again in a different forum - perhaps living with breast cancer or the surgery forum.