I too have a small GH. Last year I put a shade cloth over the top of mine. It is soo much cooler in there. I don't do ladders either
I took and rolled my shade cloth into one long roll. Then stood on the side of the GH and held the end of the 'roll' and tossed the rest up and over the top. Shimmied into place as Chelle said. I took 4 short pieces of rebar and folded it into a U shape, doubled up the end of my shade cloth and stuck the rebar through the cloth and shoved it into the ground. I did this on all 4 corners of the cloth. Has stayed in place for 1 year now and lookin good.