After purchasing a very, very used boat, we decided to launch near home in PA. Forgot the plug. Many, Many people standing there watching. Felt like a complete idiot.
We launch on to Mirror Lake off of 109. If you have ever been there, then you know that it is not level, it is sandy (no concrete), and well rutted. The only choice of vehicle was the 4 cylinder plymouth voyager that we had towed the boat up with (From PA). Launching was not a problem. Getting the front wheel drive minivan to pull the boat out of the water was a bit of an issue. We ended up having to call a tow truck to pull my van and the boat out onto the road. $60 and a lot of embarassment.
Now we have a 25' new pontoon (well, my brother does), and we use his expedition without incident. The best part is that I don't have to remember to put the plug in the bottom.