Back up to the top! I've been messing with my Tyvek tarp lately and I'm not sure I like how it's looking. I tried a bunch of different setups and I think I prefer the GoLite SL2 we've been using, even though it's about 10 ounces heavier. Tarp just seems to offer too little protection.
Also, I'm stepping up my push-mower training (in addition to my typical workouts). Today I mowed for 2 hours with my 60-lb pack on as usual, but I soaked my feet before the last 30 minutes. This sounds stupid/crazy, but it's to start to condition my feet to not blister and get as sore when hiking while wet, which they undoubtedly will be for some of the time this fall.