Oh boy! I have thoughts on this topic! And the answer is ... Don't cover if you are planning on traveling. Once snow get on the cover, it will be a bear ... no ... it will be 2 bears to deal with. It will be much easier to just let wind blow the snow off the top.
Hey ... been there, done that! Removing them with snow and ice on the cover is absolutely NO fun at all. It's dangerous, cold, and HEAVY. Don't cover if you plan to travel. Take it from experience here.
Now, if you plan on parking all winter and not moving it, then covering is a good thing. But NOT if you plan on traveling and you know it's going to snow, freeze, and ice up. Ugg... it's awful work to remove it.
And then the thing is frozen and it won't fold up to put away, so guess what takes up half your garage floor while it thaws and makes everything wet?