"DDMA".......I agree with "vsheetz". Our last coach had a ladder extension that I though in the rafters of the garage when we bought the coach new. Typically, most people carry a ladder to do their windshield or for quick fixes. Use that ladder if you need to access the upper half of your ladder.
We have this ladder 7' Double-Sided Rung Ladder - GP Logistics SLD-D7 - Ladders - Camping World
It comes in a 5', 6' or 7' model. The 6' and 7' models have steps on both sides. I bought an 8' length of plastic square fence tubing (the main upright piece with two slots cut in it) from Lowes and mounted it on the side wall of my slide out tray bay. The ladder linked above fits inside the square tubing, keeping it out of the way and EASY to access....just slide it out. I've used this system my last two coaches.