So...i thought my choice of using the tarp tent squall 2 was set in stone for my march 4th NOBO departure off Springer. then i thought about leaving that home and JUST using an integral designs 5x8 siltarp over a tyvek ground sheet with NO bivy. the reason i like the squall 2 is because of bug protection, but this time of year that shouldnt be a problem anyway. tarp+tyvek combo will weigh half what the tent weighs but there are trade offs. the one that comes to mind is water/rain protection. im using a 20* down bag that i wont want to get wet. maybe i could use a trash bag over the lower end of my sleeping bag/pad when its raining hard. the reason i say no bivy is because that would defeat my purpose of less weight and space in my pack. the tarp tent is already small and light. im not very experienced with the tarp+tyvek combo. so what do you think i should take.