Jburry, same here! We have little 'rollers' on our strip, along with some tire tracks from someone doing donuts on our field, too. Not much affects the glow planes.

I did have a hard landing, and my Nexstar bounced once and came down nose gear first into one of the rollers. It bent the gear a bit, but nothing to keep it out of the sky.

Good advice about switching wheels - maybe I'll do that. Currently using stock Nexstar foamies.