Call the cops next time. I know it's a pain to wait around. It's just better since they get the ticket. Or, maybe the cops show up and realize that they were reported missing as they were only supposed to be gone for 4 hrs. Unlikely but could happen.
On the river, I can abandon who I am and what I've done. However brief it lasts, while on the river I am nothing important and everything insignificant. I am flotsam, and happy to be so.