pour 1/2 the bait. Lay a strip in the tail. Pour the remainder. I would think hand pouring would be the easiest.
I would go to Walmart...find some foam shower shoes in a close color (I actually found some brown ones !), cut some plugs the size of the tail (you can use a punch from the hardware store and punch them out on a piece of soft pine). Drill a small hole in the center...and thread the plug onto your line and eventually against the eye of the hook. Works great if you crazy glue the whole thing together! I make my bass bugs out of this material and it works perfectly! I made up a whole bunch of these last year for my 6" carrots.
You can buy some really nice drill cutters at Sleazy Steve's Soggy Bottom Fly Shop (he's a really good guy!)... at
http://www.jvlnet.com/~swinters/If you buy the cutters from him...you might as well buy the foam there also. His price is about as good as anyone's and he has a great assortment of colors (including brown and orange!).
Betts also makes a floating "bass sinker" for Carolina rigs....and there are a ton of different floating heads for Walleye fishing.
Google:
Cabela's Two-Tone Floating Jigheads
Paul posted the link to the Betts product