Re: Solo launch - keys in or out...
I rarely leave the key in the truck or the boat. They're removable for a reason!
Here's the sequence for me.
Back into water, turn off truck, lock up.
Climb into boat, start, and proceed to dock.
Tie up at dock, turn off boat, take key and valuables with me
Return to truck, unlock, start, and move to parking spot
Return to boat, start, head out.
This changes slightly as I move out away from town. The above procedure is the norm when launching near Downtown Louisville. The keys staying or going, truck getting locked/left, and the boat running/not running is all dependent on how comfortable I am with the area. When I'm at Green River Lake I have a good deal of friends down there, and trust the area alot. So the truck stay running, the keys stay in the boat, etc.
When I docked at the river front the other day, I was |..| that close to cabling the boat to the dock for fear of theft. There were a number of other boats larger than mine docked there as well, so I figured it wasn't a huge ordeal and left it just tied up without the cable lock.
It really depends on the location for me.