Bucks panels don't maul people, thank goodness - almost every appellant comes out saying that the panel were really very nice.
I can vouch for this! Even before we knew we had won our appeal, I felt that the whole process had been very fair and the panel most kind. So it really is worth going for.
Chances are you won't have to though - the RLS distance moved out by almost half a mile last year. No guarantees of course, but I'd be surprised if you aren't in the first three on the waiting list.