It occurred to me that mabey the boat was still strapped to the bunks.
Not trying to be a smartass but my buddy and me aren't Dumbass's We took them off and it still would.
Doesn't take a dumbass to forget to remove a tiedown. I've seen some very intelligent hunters miss one on occasion.....
Early in the morning, dark, half-asleep, in a hurry, mind occupied with the morning's hunt......it happens.
To the OP's problem; sometimes you can't launch where you'd like.
Maybe not being able to launch was a blessing in disguise: did you think about trying to get the boat BACK on the trailer??
Often wrong, never in doubt...