I tow either a SeaDoo Sportster or a twinpack of SeaDoo PWCs. There are pix in my gallery. The only thing I've noticed is that the power switch helps for pulling hills (changes shift points - doesn't increase engine power).
You need to be careful the first few times you reverse with trailer (tight turning radius + poor visibility = you can get yourself into a bind very easily). Rekin that's not an issue for you tho since you'll be towing '4 down'.