You won't be able to put in anything through the valve stem. Adding beads / BBs will have to happen without the bead seated.
I don't see a point in static balancing and adding beads / BBs after. In face, I think that will cause a lot more problems that either alone will.
Had a set of treadwrights on the Cherokee for 4 summers 2011,12,13,14. I think after about 4 off road trips I lost the weights. They rode nice without the weights ... Never had to balance them much.
My current set of tires is a bit bigger and has a more agressive tread ... a lot more rubber. I balanced them with BBs and they seem to work great up until about 75. To be honest, I probably shouldn't be driving my Jeep 75.
The BBs work nice. The only time they get annoying is if I change speed without time for them to redistribute. Luckily there's enough bumps in the roads or plenty of rumble strips to help!