Generally there should be no water unless you add water (wet skiis, etc.)
my searay had a shallow well under the drain tube that ran back to the bilge pump so it would drain. only the little 4" x 4" x 1/2" deep well kept any water in it. I mopped that out with a sponge after a day of water sports.
if you have water in the bottom, find out where its coming from. And yes, you can prod with a snake drain, however I prefer a piece of plastic tubing. Snake drains are generally nasty and havent been cleaned for a while