Well I got done with the initial run-time estimate.
Using: 8xAA Dolar General Brand Akalines
3 Sesions: 1.) 1.5 hours some shots on Auto/Program, some shots with ~5sec exposure
2.) 2 hours with ~10sec exposure (LCD off via AV plug)
3.) 8 hours on Auto/Program (LCD off via AV plug) (5800 shots at 0.3MP)
So that's pretty good, I'm still going to go with some NiMH batteries though.
Maybe like these, for $7 I can't go but so wrong.