I just covered mine. I use an 8 foot step ladder to access the roof. My cover is stored in a Rubbermaid garbage can folded accordion style. I set the can at the back of the TT, and the ladder on the side opposite the door a few feet from the back to avoid the awning. Get someone to hold the ladder if you are uncomfortable. I also don't walk upright on top - I keep low and lay on my stomach when working near the corners.
I then grab the cover - the front is on top, climb the ladder and get on top. I then pull up on the cover and move forward, lifting over things like the AC, vents, and antenna. I put a mark on it in the center of the AC cover so I don't have to line up the zippers to access the door.
As the cover was folded to the center when removing, I unfold it and let it drape down the sides, then I exit the roof, store the trash can inside the door, and connect the straps.
To take it off, get on top, pull up the sides, and fold them into the center. I then drag the cover off the TT, folding it accordion style, into the trash can at the back of the TT. Of course, it gets hung up on stuff, but you can free it from the ladder.
Remember to cover your sharp points like down spouts with pool noodles or tennis balls - don't forget the door latch where you connect the door so it will stay open. The areas around the bottom of the awning supports are problem areas that need something like bubble wrap.
Don't forget to cover your tires!
And of course, washing and waxing is important, but unless you want to constantly be doing it, a cover is great for keeping it clean. I spent the entire day on the roof and detailing the rest of the exterior and under the awning last weekend. The front was stained by leaves and all the garbage falling from the trees. I'd have to wash it every weekend this time of year to keep it clean. When I uncover it in 2 months, it will be as shiny and clean as when I covered it.
After 5 years, my ADCO cover had some wear spots which I corrected with Gorilla tape.