Re: Towing from Fl to NJ...need info
Been there, done that but in the other direction a few weeks ago.
You don't have to stop for weigh stations with a private vehicle, and this applies to rental trucks as well. If you do, they will usually just wave you through.
As far as the tunnel, your only concern will be if you have any bottled gas onboard such as propane. Otherwise just so you under 108 wide I believe your good to go. (I usually avoid the tunnel just due to traffic though, unless its late at night).
As mentioned above, avoid the Washington DC metro area during peak business or rush hours. The same for Richmond, VA during rush hour. I sat there a few weeks ago for 3 hours in stand still traffic on a Friday afternoon.
South of Richmond is all pretty smooth sailing. It can get a bit slow around Baltimore as well and if your running on the weekend, DE can be a bit slow just before the bridge.
Down south the only hassle can be Jacksonville and Savannah but neither have every held me up for long, just heavier traffic at times. Take the bypass at Jacksonville unless traffic reports say it's jammed.
Which ever direction, it's a pretty pleasant drive other than the DC area, which can try your patience a bit.
Where in FL to where in NJ?
I would check the hubs and bearings to make sure all is 100% before leaving, if so, you should have no issues at all. Take a spare and a jack just in case. A good bottle jack and block or two of wood work well, as well as a real lug wrench or breaker bar. If all on the trailer is healthy, you most likely won't have any issues.