Welcome to the forum and congrats on the new Jay Flight! We have one on order and can hardly wait to get camping. A generator can come in handy, but if you plan on staying where there are hook ups, then you won't need it. Save the money for now. Here on the forum, if you haven't already discovered, there is a search function. You can spend day upon day reading up on various subjects. Don't ask me how I know.
Camping in the drive way is excellent advice.
Most important! Take your time and have fun.