I have a 10-foot section of 2-inch PVC, 2 DWV long-sweep 90-degree elbows and a 2-inch coupler. The 90's go at the top end, to form a 180. The coupler goes at the bottom end and the hose on my shop vac fits into it perfectly. I use a bit of duct tape to hold the hose and fittings in place. Now I can safely walk along the ground while cleaning the stuff out of the gutters.
A thinner, lighter 2-inch plastic tube would be even better, to reduce the weight.