My friend and I will be in Yosemite mid-August, our first time there. We're from out east. We missed out on booking a wilderness permit for the trailhead we wanted not too far from Tuolumne Meadows as the reservable ones were all booked up.
How early should one arrive at the Tuolumne Meadows wilderness permit office the day before a trek to be assured of getting a first-come first-served permit? Is 30 minutes generally ok, say on a Thurs? I don't think I want to wait in line for too long but there aren't very many of these permits available.
Thanks.

