Keep it OUT of OD (unless you are going downhill/flat grade) and a tranny cooler and VB mod are nice.
It should tow 2 sea-doo's no problem, unless they are the new huge ones, they are prob around 5-700lbs each, plus trailer, it will do it no problem.

89 4Runner
3" BL, M/T locks, 33"bfg mt, bilstein, Kayline, tubebumper, toyotafiberglass panels
TBI: Elocker,3.4 w/ORS,b+b,S2Sstg2cams,arias pistons,P+P intake,TRDs/c,URDpullies+7th,downey headers,MAPECU2,WEGO WB, SupraMAF,walboro255,stg4clutch, EPaOo2 sim