If it's not rusted, just flush it, and put in the new float and sock. While you have the tank off, backflush the line from the carb with some good solvent, and put a new filter on.
Unless money isn't an important part of the equation, in which case, just buy a new one.
Go for it! Use different mounts (tripod, magnetic, suction cup) and be sure to use a lapel mic, just don't rely on the cameras internal mic. If you need any help with cuts, intros, or editing, drop me a line.