I usually put ours on by myself – not very difficult.
Our cover has “front” and “rear” labels sewn on it.
I spread the cover out in front of our RV with the rear of the cover closest to the front of the RV, tie a rope to the rear of the cover and throw the rope up onto the roof, climb the ladder up onto the roof, slowly pull the cover up and across the roof, spread the cover over the sides, climb down the ladder and secure the cover tie straps.
The DW usually helps with removal – the hardest part is folding it up and getting it back into the storage bag…..