I have open slots (heh) for the following:

2 Setup* (work 5:30-8:30, time to change and see the whole show)
1 Front Door (7:30~10:15) see the whole second act
1 Coat Check (7:30~11:30) work the whole show, but you get a good view
1 Breakdown* (work ~11:00~12:30) but you see the whole show

* must be able to climb stairs with ~30lbs loads

(photo of Kyin by Andrew (c) 2008)