I've had several Goldline covers from National RV Covers and have found them to be great. I have their 28' Class B cover now for our 2551 and expect to get 3-4 years in the blistering western Colorado sun, from past experience. They strap down tightly and are ample enough to reach to about 6" from the ground. They have a 5 year warranty, longer than I've ever kept an RV except for my 2000 Aliner. https://www.nationalrvcovers.com/s/class-b-rv-covers/28.html
Follow their instructions for installation after the first time, which you will need to do to determine front and outside. Hopefully they are now using the method I describe below to pack the cover, which I have shared with them when I got my latest cover.
To remove the cover, unzip the back panel, fold in up over the top. Climb on top and pull the sides up and as neatly as possible fold the sides to the center to about 3 ft wide. Climb down and go to the front and start tightly rolling the folded cover in on itself on top of the hood, which should be clean because that is the way you had it before you put the cover on, I hope.
Now the next time you want to put the cover on, just hoist it to the roof, ( I use a step ladder in addition to the RV ladder) get on top of the RV and unroll the cover to the front over the AC and vents. Start flopping the sides down as you work your way back to the ladder, being careful not to step on accessories up there, but most of all careful not to challenge gravity. You will lose. This works for any RV or trailer, but is really easy with the Goldline since the back flap unzips in both corners to nearly the top. Be glad you have PC because you can actually walk on the roof.