Don't know if the photo will come out. I'm getting a fifth wheel soon, and this is the pitch of my driveway apron. Do you think I will have a problem with the truck angle?
Put the truck on the steepest part of the grade. Set a 4' level on the bed rail so the end is at the end of the bed. Then lift the front until it's level. If you lift the end less than 6" you should be fine.
(I'm assuming based on the picture that the main driveway is level or slopes towards the road. If it slopes away from the road this doesn't work so well.)
Like mentioned, if 6"s clearance or more when level, it should work. The FW hitch itself, will tilt, and the pin ride up to latch. Hard to say your exact angle, but my driveway is similar, and I've had no problem, with my 6"s of clearance.