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As Garris indicates, you can do it easily, assuming the TRAILER has good brakes, preferably disc. Drum brakes are worthless in a saltwater environment and quickly becoming obsolete.
Since 1990, EVRY YEAR I have towed my Outrage 25 with twin 200 Mercs (a boat that is probably heavier than yours) 1400 miles EACH WAY from Chicago to Ft Lauderdale, with a Caddy with 5.7 liter GM/Chevy V-8. Per owners manual, I HAVE to drive in 3rd (no overdrive allowed), I get about 9 MPG and never go over 63 MPH. This speed is perfect, since all the traffic will be passing you continuously, which basically leaves the road wide open ahead of you as they speed by. The only thing you have to watch out for are the semi-s and other large non-aerodynamic vehicles such as a bus/RV, which can draw you in to them as they go by. So I stay as far right as possible and have no problems. My Continental trailer is in great shape, even though it is a 1989 model also. I use Goodyear Marathon radials.

I assume you are talking about Venice FL. Co-incidentally, I am over there several times during the winter season with my 25, since the lady in my life owns an ocean front home on Casey Key (just north of Venice), complete with Intercoastal side dock. So I will keep an eye out for you.