My wife has become interested in hammock camping and backpacking. This past weekend, we hung hammocks next to each other off of some closely spaced trees. My 11' hex tarp really wasn't sufficient - it worked for the very light sprinkle and morning dew we experienced, but the end of my hammock was damp in the morning. I think a 12' rectangle tarp would make a big difference. But there are also wide versions, versions with pole mods, 2-person tarps from Dutch Gear, etc... Does anyone have experience with tarps for a pair of hammocks and suggestions on what works well and what isn't necessary?