Sorry to be the bearer of bad news but according to Toyota and the 2006 tow vehicle guide. the MAX a Tacoma (with tow package) could tow is 6500 pounds. I would assume that would be with a WD hitch.
When I was looking for a TT my wife found this site http://www.rvtowingtips.com/what-can-i-tow.htm
and it was a real eye opener for us. What we thought we could tow was not the same as what we could tow. Of course it is only guide lines but we have followed them and have been very happy campers, pun intended, with our vehicle/TT combo. If you look at the bottom of the page, you will find a link to a weight calculator (it's an Excel spreadsheet) that should help you out.