Apple Logic Pro /LogicExpress Discussion

I am planning on using Mainstage at an outdoor event this weekend.   I don't have battery power for 3 hours, so will have to plug into the generator that is provided.  Does anyone see any problems with this?

On a side note, I had followed the thread awhile back about Mainstage missing the first notes after a patch switch, or being slow to respond.  I have seen the same thing, but now have found by rebooting and making sure all other programs are off, the problem goes away.

Mike