if you truly believe your skills are expert (i am not saying they aren't), and thats what you're there to ride then book the whole cat or don't book at all IMHO.
they'll always dumb it down to the least competent rider.
Oh yeah, I know they dumb it down for the least competent rider (liability). The dude should have picked the intermediate or beginner cats, not the expert cat. I expected to get a bunch of gnar riders (there were a couple). The last time I went out, we booked the "über" cat....and we definitely got what we wanted. Super solid crew that time around.