I had a 2 hangers made out of 3/16 X 2 inch wide strap, and welded a mounting bracket so it could be mounted to the frame with stainless bolts and Nilanuts so it wont unscrew. I had a A frame ladder but it was unstable on uneven ground 4 legs verses 2 and I can get to the roof if needed a lot safer, the OEM ladder is ok, but hanging my chairs and a ladder on it looks like a bit too much for the OEM ladder. LOL I am Trailer Trash 2 but realy dont want to push that name to the limmit.
As for clearance? there are none the front legs are in there normal position which is lower than the ladder by a inch.
if you notice the tubes it seems they have changed the way the door opens, instead of that heavy spring pull and turn, to a nice spring loaded thumb lift latch, I might get another to match the new one.
securing the ladder to the bracket is simple a 1/4 inch pin through the bracket and ladder the kind with the ball berrings that go in whe a button is pushed. and a bike lock .