Even if its a marginal set up, 2wd, no trailer brakes, and your towing locally give yourself lots of braking distance and keep the speed down you'll be ok.
I tow with a Jeep Commander AWD/4wd and a '99 Chevy K1500 4WD pickup. Towed my 204C Overnighter for years with the old Loadrite trailer w/o working brakes and got away with it but that's not saying you should. Rolled the dice with every out of town trip.
Last fall I bought a new dual axle Loadrite with brakes on both axles and the feel when stopping is night and day.
A half ton truck is size enough that the boat/trailer won't muscle it around. Your good.
A smaller tow vehicle might have the power to pull it but without the weight it will be pushed around especially on a wet road.
If I had to choose between towing with a small powerful truck and a big heavy under powered truck I'd choose the big heavy truck hands down !
On the ramp does the truck have 4wd or at least a posi rear? Green algae at the bottom of a ramp has accounted for a number of embarrassing youtube videos for 2wd tow vehicles. Straps, always use straps! Last remember that your towing, you can't drive like your not !
Sounds like a no brainer but a lot of people don't seem to get it.
Keep the speed down.
In NJ the Motor Vehicle code states towing vehicles are limited to 55mph and theres a reason for that. I'll tow a little above on the parkway, maybe 60 but we see folks towing 70+. Their just asking for it.
Your Seafarer has 2' on my Overnighter with the same beam (1' more deckspace, 1' more in the cabin).
