Welcome to the forum. I went to our local state park this past week and the camp host setup had a fifth wheel. He had setup a set of wooden steps to get into his unit instead of using the flimsy metal steps that most rv's have. i suspect with you having a big truck required to haul a fifth wheel you could come up with a similar plan.
And I'm not trying to be humorous, just throwing it out there, but some fifth wheels have a garage for play toys such as motor cycles, golf carts, etc. these are typically called toy haulers. The key though is they have a ramp out the back.
Good luck.
