I want to build a quick rough and ready canopy frame for a wooden sleigh bed without damaging the bed itself by screwing or gluing anything to it. Since I can't use cable ties or anything to tie the vertical pieces of the canopy frame to the bed (since there are no 'bed posts' I was thinking to use a few g-clamps to temporarily secure it altogether. But is there a cheaper type of fitting or clamp? I'd rather not buy 8 clamps I will never use...