If conditions are bad you want the tarp.pitched very tight to the ground to stop what your talking about. As long as the groundsheet is a good bit smaller than the resulting tarp edges you'll be fine. Just don't set up in a dip. I wouldn't have a ground sheet smaller than my sleeping matt especially if wet.
If conditions are bad you want the tarp.pitched very tight to the ground to stop what your talking about. As long as the groundsheet is a good bit smaller than the resulting tarp edges you'll be fine. Just don't set up in a dip. I wouldn't have a ground sheet smaller than my sleeping matt especially if wet.