Dan,
I had to look far and wide at your past trip postings, but ... I FINALLY found a photo showing the entrance side of your Fun Finder X!
It looks like it has a built-in awning. If it's anything like ours, it's main metal legs don't have to be attached back down low on the trailer wall so as to form a triangle support shape with the awning. After the awning is out, it's metal legs can also be left hanging down vertically to rest on the ground and support the awning. Each leg should have a flaired metal foot with a hole or two in it for round metal stakes to be sunk into the ground to hold the legs along with anchor ropes - and hence rigidly support the two outer corners of the awning.
If your awning can be erected this other way .... couldn't you then use it's (now strongly supported and anchored to the ground) outer edge to use ropes to hold the corners of a larger tarp that can extend way out further .... and then use poles and rope/stake anchors to secure the furthest corners of this tarp?
Just a thought - when there's no trees nearby.
