Let em dry out and you'll be fine. The only thing water soaked foams will do (I think) is add extra rotatating mass and a heavier load upon your engine. Also make sure you have a hole on the inside of the rim to allow them to compress and/or drain.

I remember reading in my N-Rusty manual that you should glue the tires about 4 or 5 times around the rims and rely on the capillary action to pull the glue around the full rim. I did that once and the tires nearly came off. The next time, I applied a bead all the way around and haven't lost one since.

Good luck