Mark,
I tow a '99 horizon 220 with my 2005 Tacoma v6 w/ tow package with NO problems. Pulls and stops it like a champ. I compared the weight of our 2 boats, and yours comes in about 450 lbs. heavier than mine. (depending on engine choice: I have the 5.7 gsi dual, which puts my published dry weight at 3290)
As for towing package on the Tacoma. It adds: class 4 hitch, transmission oil cooler (for automatics), engine oil cooler, heavier duty battery and alternator, and the 7pin connector. So to answer your question, no, the package will not magically double your towing ability, but it will make it much safer and easier on the truck's longevity to tow that much. The things included are great to have anyway, and would be more expensive to install individually aftermarket.
Flying Sushi is mistaken, the tow package does NOT change axle gear ratio to 4.10, that gearing is only available on 4 cylinder models. Mine is geared at 3.73, and that seems to be just right.
Let me know if you have any questions about the Tacoma. I've had mine for 3 years/65,000 miles and LOVE it!
