This aircraft is the same model owned by the WT. It is a twin-engine Piper PA-31-310 Navajo and it's N number is N254SW
As their other Cessna twin-engine, this one is also based in Alaska. It is registered to "Kingdom Support Services" , the corporation that holds titles to all of WT's vehicles:
Kingdom Support Services, Inc. (Incorporated 2000)President Harold L. Corkern
Vice Presidents Alan D. Janzen, Robert L. Butler
Secretary/Treasurer Alexander W. Reinmueller
Directors James F. Mantz, Jr., Thomas Kalimeris, Alan G. Browning
It was registered just last Friday 04/02/2004: http://162.58.35.241/acdatabase/acmain.htm
It seems it was acquired from "Emerald Aviation" based in Kentuky. http://www.aviation.fs.fed.us/carding/SearchContractOne.asp?ID=660
... and just on time for the spring fishing season!