I had a few questions about the AIS laws, so I contacted the DNR. Here’s a little info I received from them:
I asked the question about whether pulling the plugs is enough, or do we have to make sure all water is drained
Pulling the plugs and allowing the water to drain is the main item included in State Statute. There may be a little residual water remaining in your bilge/live well etc. but it would not be illegal to transport your watercraft with that residual water remaining. If you would like to take an extra step to remove that water with a towel or sponge that is up to you; our watercraft inspectors are equipped with tools to help remove that water as well.
I asked about coolers and other items in the boat that can hold water
Coolers/Ice/Water Bottles are not something that we generally check for AIS. If you’re using a cooler to store fish, however, you should drain that water once you arrive at the landing. A Conservation Officer would look at that situation in a similar fashion to a bait bucket which also has to be drained prior to leaving the access (regardless if it contains lake water or not). Storing fish on ice is a good way to keep them fresh, and if you would like to keep that cooler in your vehicle until the end of the day and transfer your fish into it at that time that would also be acceptable.
I asked about keeping fish in the live well during transport and putting ice in the live well.
Filling your live well with ice at a gas station is perfectly fine as long as the drain plug is still pulled. Any melt water would drain as you drive.
I asked about the need to remove Duckweed.
According to State Statute duckweeds do not need to be removed from your water related equipment prior to transport. If you would like to wait until you arrive at home to spray your boat down and clean it off (recommended but not required) that is perfectly legal.