I did the same thing for the 2017 eclipse. Here's what I can recommend:
1. Don't wed yourself to one location, and don't make reservations anywhere. The weather will drive your location. I relocated four times before I managed to hit the sweet spot on the weather, and despite the trouble, it was worth it to not lose any frames from beginning to end due to clouds. It wont due you any good to have a great location, but no visibility. Espenak's eclipse atlas was worth every penny to zero in on potential sites.
2. Get there the night before at a MINIMUM. Take a hand transit so you can shoot azimuths and elevations to ensure a clear field of view. Get set up and polar aligned as early as possible, and practice the exact sequence as many times as you can. If you think you will nail it on the first try, you will be mistaken. If you are going to fully automate, you'll need a means to set times to within a fraction of a second, and to access online ephemerides or have an application to calculate the exact timing at your location. A GPS or Espenak's atlas are essential tools.
3. Take a backup for as many things as you can, and way more batteries than you can ever imagine needing. You may end up in a location with no electricity. I had NO amenities in 2017.
4. Don't underestimate how many people will show up, and make sure your field of view will not be blocked. Another reason to get there early. The primitive site in the National Forest where we were was set up for 20. By the night before, it had 350, and another 100 or so came right before the eclipse. My friends that left immediately after sat in traffic for seven hours. I stayed put, and we drove straight out about four hours later using back roads and Espenak's atlas.
5. As far as preparation … practice, practice, practice, and when you are sure you have your plan perfected, practice some more. Think about what frames and exposures you want, when you want them, and how you are going to rapidly change settings. Eclipse software can help a lot here, although I did it manually myself. But I will tell you, the time passes way faster than you think.
6. Don't get so focused on grabbing images, to not take a moment and observe the eclipse visually. I had a separate scope set up for that, and one for public outreach.
7. Don't discount the other wonders of the eclipse. I will have a separate video camera set up to record peoples reactions and sounds, the shadow bands, and data loggers for sky brightness and temperature. There is a lot to see and do. Think it through carefully.
8. Research on the web other's experiences, and their recommendations. It was invaluable guidance to me. I imagine it will be for you as well.
9. As for equipment, set up what you have and try a series of shots at the same time of day and solar elevation. Get familiar with various camera settings, and what your equipment can and can't do. Let those experiences guide you as to what you might need, or things you might want to change. I had a wide angle lens tracking the Sun and Corona, and two scopes of 400mm and 600mm focal lengths for the eclipse. Don't forget you need solar filters for everything, including finders, and the filters need to be both secure, and easy to remove as you will need to pop them off during totality and slip them back on near the end. I had to train my wife to help do it since you need to be quick. And don't attempt too much. And most importantly, be prepared for every contingency. A lot of things will pop up during your practice runs. Have your backup gear well organized and be sure you know where everything is. Drill yourself. If you spend 1 minute looking for a critical replacement during totality, it is a big deal. And don't forget to refocus right before totality, since focus may get a bit soft as the gear heats up and expands. You don't want fuzzy proms or chromosphere, or a blurred corona.
10. Be prepared for a LOT of public interest, and be ready to do some outreach. I did several video interviews, answered innumerable questions, and shared my scopes with scores of people. Bring a stool or tool box for kids to stand on and look. Their sense of awe and amazement is as priceless as the eclipse itself. We ended up setting up a group e-mail to share eclipse experiences, and that went on for several months after the event.
Good luck. Send me a message offline if you have any questions.