I am new to hanging, my wife and I backpack and plan to try out the hammocks rather than our trustee ground system. I want to make a tarp to use over two hammocks on two trees with Dutch's double hammock whoopie hooks. My spreader is 35" wide. Will a 10' wide tarp do for this? I am planning on a 12' ridgline, 5' side panels cat cut and door closures on both ends. I will install some pull outs, two per side, but when staked (as oposed to tied on trees) these don't seem to help much. Thanks for any tips.