Many folks swear by bread bags (there is actually a summitpost gear review for them).
I often use neoprene socks for one-day trips in transitional times of fall and spring. You can get 3mm versions that are ankle-high; be careful, as cheaper varieties are made with seams that can chafe. I give the seam stitching a very light urethane coating, else the stitching breaks and the socks fall apart. In neoprene alone, your feet will be wet all day, and will look like they have been in a bathtub. They can get really cold at the end of the day if your shoes are sodden.
Neoprene socks take forever to dry, even in warm weather. You have to turn them inside out several times to get them really dry. It seems that you could just change the inner socks a lot with the goretex version, and wipe out the insides with a towel.