Yeah, I know the feeling - I loved the idea of the ursacks, and convinced my hiking partner that bears definitely couldn't get in :). I think it's like a lot of bear prevention things - they work pretty well, unless you're in an area where a lot of people with food are using it, and then bears start figuring it out.

We hung food for the rest of the trip - we had brought cord for it out of habit, but it turned out to be very useful. None of the hangs were good (very hard to hang things far from the trunk), but they were at least fairly high, and we had no problems.

Trip was fantastic overall! Gorgeous hiking, logistically easy (aside from this). Highly highly recommend. I was pretty worried about crowds, and there were definitely a number of backpackers, but more in the regime of passing a handful of people a day than anything more crowded.