Wolf makes good covers, I have the "Noah". Make sure the cover you get is breathable.
Make sure to wax the heck out of the car before you wrap it up. More wax than you would ever typically use, you can strip it in the spring. Fill it with gas and add methyl hydrate. Change the oil the day you are putting it away, and consider "fogging" it. Take the battery in the house. Buy additional rope to secure the cover to the car (wind whipping them around is bad news, dust will get in under it). Park the car over a tarp, and tent peg the tarp down (ground moisture protection). Seal all your openings off (mice) and toss a bunch of dryer sheets in it (bounce)... mouse and moisture protection. Some say to leave the windows cracked... I'm betting the vert top will allow that breath-ability.
Leave it sit on it's own weight, put the tires at 45psi.
If you get some windy weather (I'm sure you will), consider taking the cover off, washing it, dusting the car off, and recovering.
I covered mine outside for years (not through the winter, but pretty much all spring/summer/fall).
Good luck.