We use iPod touches and a similar system with student volunteers. We've setup parent restrictions that come on the iPod to disable opening almost every application and most setting changes without a passcode. We also make use of Apple's iCloud which allows you to remotely track and wipe devices...
Re: Led Par CansYou should probably coordinate with the other designers as well.
Who is doing costumes and what colors can you eliminate from your or their design to avoid clashy uglyness?
Talk to the director about what he wants to see, while its your design, its his or her vision.
Honestly, it depends on your budget. What you can, and what you are willing to spend.I'd recommend first investing in Floor Mics. Essentially they are "Area" microphones. Put one or two on the Aprin or edge of the stage before the drop to the orchestra pit. You can pick up ensemble and general...
I use ShowBuilder by stage research.
It's expensive, but worth it. It's an amazing tool that keeps everything right where its need to be and built specifically for stage managers.
They also make SFX which is a live sound playback software and a few other sound and lighting programs.