That's no fun at all.
I ended up putting together a "field box" that goes with me and has screwdrivers, pliers, several glue types, a battery powered hot glue gun, plenty of tapes, bamboo sticks, combat streamers, etc. for those in the grass repairs. At this point I don't even open the box most trips to the field, but it's really handy to be able to help fix anyone's plane and get back into the air.