Congrats on the new TV and 5er. I would suggest taking all the interstates you can to get to FL. Use the major fuel stations along the way the first time with the 5er as they will have turning space and the height needed for the trailer. Keep your speed down as MD said, you will get the better mileage and enjoy the trip. You might also take some time at a large parking lot turning right and left so you know just how far you can turn with the trailer attached. Will help so you don't get into a station that you can't get out of.