MT, I assume that you are referring to the CCS tarp... yes, the PLUS models include a full frontal screen, which zips up on the side. The numbers refer to size, ie Lean 1, 2, 3. The plus adds the screen, ie Lean 1+, 2+, 3+.

When the weather is nice, I typically just throw the awning over the back. There are tie-off loops everywhere on it. Once set up, I do tend to adjust the awning as conditions require. I might slant the awning down in one corner to keep rain away, but leave the other corner up, etc.

Not sure on weight, but I'd say comparable to a 3-man tent, less the tent's poles.

Ranger