Hey Matt,
The pocket wizards are well known for being shielded and just flat out working but they are expensive but they will do exactly what you want them to do.
Take a look at the Radio Poppers system before you leap to Pocket wizards. I am using my Radio Poppers JrX units for the first time today. I have been using FlashWaves but they were asking very much like your system is now.
www.radiopopper.com/ Much cheaper than Pocket Wizards!
I just finished up a press conference where they worked flawless! No miss fires and no flashes going off on their own.
Tonight I follow up with 2 volleyball games in a university gym where I always had problems with my old units.
I will report back how they work!
If you have Alienbees strobes the JrX Studio version will allow you to adjust the power of the strobes right from the camera. A very nice bonus feature.
I am using the system with my hot shoe flashes right now.
Kelly