No problem - I just put those tires on, they are 285/75R16 Bridgestone Dueler M/T/s. I got 50k miles out of the last set I had a few years ago, so I gave them another shot. They are a little noisy but for a mudder they aren't too bad.
My traction bars are twice as long as the front half of the leaf springs, so in theory they shouldn't restrict the leafs. The leafs are pretty flat to begin with so there isn't much change as they flex. In any case, it's worth having them to get rid of the axle hop.