First off, congrats on your boat. I had a Seafarer for 10 years and loved it.
This is a thought for the future once you get your rig home and settled in.
The trailer you purchased is too light. You will be at max capacity once you load your Seafarer with gear and fuel. I recall mine weighing 5800 lbs with trailer. I have heard about way too many salespeople selling customers inadequate trailers to keep costs down.
I have had several bad experiences pulling Gradys on under equipped trailers after believing salespeople. Bearings blow prematurely, welds eventually break and, on two instances, the axles bowed in the middle from the jouncing of the hull going down the road. That resulted in the camber of the tires going awry and wore the tread off of them before I knew what was happening. Once I beefed up the trailer, all those problems stopped.
This new trailer should get you back to Venice without problems. I would consider swapping out axles in the future, or investing in a more capable trailer, unless you just plan on towing short distances to the boat ramp or local marina.
In any case, permit me to wish you a safe journey thru the middle of a Pandemic. As you know from living here, you'll get many days, especially in the summer months where the Gulf is placid and you can go about anywhere. When it's rough or just too choppy, the ICW, Sarasota Bay and points North & South are easily accessible.