I race in the vets in Yorkshire and everyone gets on properly!
I used to race, back in the 90's (1990 - circa 1996), then again 2007-2009
I had a retry, at Thornes Park last year, & suffered

(I knew I would!)
I think I'm working for 'T P' this year, but might have a go at, or at the very least watch. at Middleton Park (23rd?)
My saddle to pedal height is exactly the same as the road bike and the tyres on the crosser are obviously bigger
When you can it from one side (usually the left) then try to do it from the other side too, just in case you ever need to get off that side on an off camber.
My saddle was set roughly 1/2" lower than my road bikes, but with the same set-back (as far as the frame/seat-pin allowed)
Cambers.
Myrtle Park springs to mind, or how the course used to be, crossing the camber by the concrete steps
Temple Newsam had a cambered section too, but that was always rideable