Go ahead and crimp those barbs!
O.K., you may lose the occaisional fish but, with Tarpon, the majority come unstuck after the first two dozen somersaults anyway - their mouths have the consitency of pre-stressed concrete.
Most species - big and small - seem to stay stuck pretty good on barbless hooks. Try to keep good tension and you should be fine.
When sight fishing, look over your shoulder from time to time, you never know who's behind you