Glad you had a chance to give it a try for a few hours. I am not going to suggest you cut out anything, after your first trip you will have a better idea what is important to you and what is not. And you might realize you forgot something. Maybe a small pad to keep notes will be helpful to remember random thoughts as they come to you. I like to keep a pad handy, especially for grocery lists.

Yeah, the wind dictates if you have a good or a bad day.

And in Florida, you only use maybe four gears so unlikely you will have a gearing problem.

After a while you will decide what you want in each pannier and why. For example, I have a kickstand on two of my touring bikes and the only pannier I can remove first without the bike falling over is the front right. So, when I get to a campsite, the first thing I want to do is put up a tent, so the tent is in the front right pannier. And the tent often is damp in the morning, so that means everything that goes in the front right pannier (Ortlieb Frontroller) is something that can get wet without causing any problem.

With time and experience you will establish your own rules and procedures, which will differ from other people.

I did a couple week bike trip in Florida in Feb 2017. It did not take long for us to realize that we wanted to start out early before it got too hot, but if you live there you already know how to deal with the heat better than we did.