I would have to say, maybe watch the thrift stores for a patio umbrella. If it was me, I would find the umbrella and based on the size of the pipe, I would make a bracket that can screw to the deck. And, then drill a hole the size of the pipe in the deck board where the bracket will set. Set the pole in the bracket high enough to stand in front of the smoker and mark a hole for a pin. Also lower the pole and mark another hole for a second pin.
While its doing its thing leave the umbrella down and when you need in it, raise it back up and stick the pin in it. Good weather, leave it up for shade. Rain and such, let it down to protect it from the weather.
You may be able to put together a make shift shelter with a few odds and ends from lowes if you still have the balance from the card.
LOL last option could be the shed. I'm laughin cause its something I would do in a critical situation. Just don't slip and spill the food when running from the front door to the shed.
If you do the umbrella deal, let me know and I will weld you a bracket and drop it off. I can probably come up with a drill bit too.
I did read in the manual to store it in a dry location.
BTW.....I should have a couple stainless damper vents cut out this weekend. If I make them correct, you will be able to just use a sheet metal screw and put it where you want the vent to go. Then trace the inside of the cut out opening. I am making it so its like the weber vents where you turn it 90 degrees to be full open. My free hand skills are not that great so I am making pattern stencils so they turn out just a little nicer.