I'd bet the boat will weight a lot more than 7500 lbs. Water is 8 lbs/gal & gas is about 5 lb / gal. Plus anything else that is on the boat adds up.
I towed a 10,000 lb rig all over Michigan & Ontario with a 3/4 ton van. Make sure you have a hitch rated for the full load, make sure you do not have too much tongue weight nor too little and DO NOT use a weight distribution hitch with surge brakes! I almost had a major wreck with that setup.
Leave yourself plenty of room & don't be in a hurry.