I've done this once too and I have one from experience to add.
After launching your boat without the plug in, calming your wife and sister-in-law, running to boat into the bank, then finding the plug and inserting it. Do not idle out of the marina with the bilge pump running and decide to shove the throttle wide open. All that water in the boat will rush to the back and the boat will stand straight up on it's tail. You will be looking at the clouds in the sky. Then, when you pull the throttle back to idle the water will all rush to the front and the FRONT OF THE BOAT WILL GO COMPLETELY UNDER WATER. We ended up with only a few inches of my one year old boat above the water. Needless to say I idled out into the lake and let the little pump clean the water out. Was scared to death the water would short out the battery and kept the motor running. Scared the wife so bad I thought I was going to never get her back in it. After this SHE always checked the plug after I did.
RSKY