A plea for help

Bradley's family reunion is starting to weigh heavily upon my head--it's less than a month away, and I'm totally wigged out that it isn't going to be as good as the other ones. Be that as it may be, I have a question:

On Sunday, we're going to have an early dinner (church gets out at 2, so probably around 4pm) and then go to Temple Square to explore and take the traditional family pictures. We're planning on staying at Temple Square until nighttime, essentially, and I know from my own experience that people will get hungry around 6-7pm. So I'm trying to come up with a "supper" that we can pack up in a cooler and have when we do get hungry, without leaving Temple Square or buying anything.

Easy--sandwiches, right? Except we are packing lunches for the following two days, and I'm worried people will get tired of lunch meat and chips. Does anyone have any ideas? I admit to being stumped, but my brain is a little frazzled right now and so it's no wonder I can't think of anything.

If you have any ideas, shout out, would you?