You can sometimes find a Dometic Cabana, like the ones made for an RPod trailer, on ebay. And, if you're handy you can add a flexible awning
track to the side of the scamp
or otherwise fabricate an means of attaching.
I found a cabana there last year for less than $200. I use it attached to the utility slot on the awning
tube of our trail cruiser (our other trailer) to shelter a picnic table. I've seen them at CW for over $500. It can be fully enclosed, but we don't use the zip on front.