Not fun but do it all the time. I have a 32 foot MH and a 14 ft boat. I can see the boat through the rear window, but it's hard to tell until it's too late if you're not straight. I have a wheel on front of the trailer, so if the ramp isn't too steep I disconnect and wheel the trailer as far as possible then reconnect. It is a pain and if the landing is busy, forget it.
Unfortunately the Class A's, in the last 10 years, have fiberglass fronts which would not be a good idea to cut a hole through to attach a hitch.