So long as you don't return to your raft to find your groover full of someone else's.....deposits
If the Ruby Horsetheif story went down as the OP told it, then that's a shame.
Once on the Main Salmon, we arrived at our reserved camp to find squatters living there. Our permit holder/TL asked to see their permit (which they claimed was legit) and it was obvious that they had changed the printed info with a pencil. Not even a good fake job. It was late afternoon, but instead of fighting with them, we moved on, but only after writing down their permit #. As we pulled away from that camp, we noticed a bear heading along the shore....straight for their camp.
What they didn't know was that our TL was a river ranger on the MFS at the time, so he made sure they were reported and their permit holder dinged for the offense. We had a wonderful evening in another camp.