I've been using a tarp over mine.. Started out with the generic blue tarp but ended up with a silver one.. they seem to hold up longer. I was going to buy the CS cover but they don't go all the way to the deck.. just to the bottom of the lower cabinet base.. doesn't cover the "floor" of the cabinet or the feet.
Then considered having a custom one built by the guy that rebuilds spa covers.. he did one for my hot tub and it's been in direct sunlight for about 10 years now with no sign of breakdown.. but...
What do I do when it's raining and I want to smoke something? Pull the cover off and leave it exposed? Nah. I stayed with the silver tarp which I've simply tacked to the side of the house with longer map tacks and left it high enough that it clears the long thermometer going down the smoke hole.. and loosely drape it around the smoker.. this allows it to breathe and exhaust fully and stay dry.. I move the tarp to the side a bit when I check the progress.. but otherwise stay s fully covered.
I'm condidering building a "shed" this spring.. possibly one that will cover it, hold wood and accys, and also hold the new ceramic I'm probably going to get for a late Christmas present..
Bill
Not all smoking is bad for your health