i pitch my DIY bridge very close to the ground, so the UQ is just inches above*, and take the tarp all the way down. this works well for coverage. my tarp is 11 long by 10 wide. sides are about 8' and hammock is 6' long.
the only drawback, i cannot use my Dipsy snubber tensioners this way but I stay dry.
also makes it easy to sit, exit and enter the hammock. (and reach things on the ground, like water)
*you may have to experiment, due to stretch and sag if applicable
in favorable weather however, i like the "porch" mode: