Winter covers

I was just thinking about this on my drive to work this morning. When we bought our TT in 2010, we asked the salesman about adding a cover with our purchase, and he advised against it. We don't have trees near our parking pad, so no leaf debris collects, but it sure got dirty over the winter.

Now, with the MH, we're considering a cover. Would using pool noodles on the corner work to keep the cover off the corners? How do you protect the A/C, vents, etc. from the extra weight of the cover? Do they even need additional protection?

Also, if you cover, what brand do you use/recommend or did use/advise agains?

Thanks!