I agree - drive home with the existing tires. Do a simple check on the pressure, temperature, and wear each day on the trip home - if you see any separation, low pressure, excess heat, etc., then you know you have a problem and can fix it before continuing. None of those issues, then you're fine.
Boat towing - you might want to invest in a front hitch. It can come in real handy at some boat launches and even campsites to be able to push the boat from in front, then trying to maneuver backwards. Don't know anyone who got one who doesn't love it.
