Hooks are not a problem, I have taken them off a snap ring, unscrewed them from the plug, or cut them off till I got home to get them out. A good leatherman and a pair of fishing pliers are always close by, along with a sharp knife and a bandaid. I have always had to remove them myself anyway even with friends. I even removed one from a doctor buddy of mine years ago. Knee caps and wrists are a bugger.
I find floats by myself more relaxing because I alone am in control of the day and can sit the pace. Group floats are more work and usually involve more alcohol making the day longer and the morning after a little hazy. Solo trips, I get up nice and refreshed from a good night sleep.
If you are really worried, Delorme makes a nice little satellite communicator now for about the price of a good gps, they even have a gps unit with the communicator. You can send texts and get help in remote locations if you need it.
Of course, we are all assuming that you are in good health, physical condition, and are a skilled canoer. If not, it may be a deal breaker.