Auto bailer is a tube that has smaller openings than the inside diameter of the rest of the tube . There is a little ball ( most of the time its hollow plastic ) that blocks the opening end that is inside your hull and the other side is kinda always open so that when moving , the water inside your hull , will move out thru this hole .

Floatation .... put some pool noodles alongside your engine mounting rails and up under the bow ( if you can ... ) or you could use some empty 20 ounce pop bottles under the bow also . And , pending on how much room you have ... you could also use a plastic half gallon size milk jug . Just make sure to seal the caps on TIGHT .
Pool noodles , simply hot glue them in place or use rubber bands . The standard size pool noodles fits just nicely in most gasser size hulls .

One more thing ... instead of the auto-bailer , you could also use a water pickup , but instead of having it aimed towards the front of the boat , have it always in the water , and aimed away from the boats travel direction ... this way , any water that is in there , gets sucked out .
use a piece of fuel tubing with a clunk connected and have it just long enough to touch the bottom of the inside of your hull and wha-la ... instant auto-bailer . I use this style in two of my boats and works just fine . ( and with an auto-bailer , you get the chance of something blocking the opening and then , it will not STOP the water from coming in . With the water pickup method , there is no chance of this happening .