My towing question leaving early Friday

Don't come here looking for easy answers. There are none. I can't imagine why you waited until "leave tomorrow." With that kind of weight behind YOU NEED BRAKES. This leaves out flat towing completely, and probably most dollies.

"Don't have time to install a controller?" OF COURSE YOU DO. Even if you cheat.

I just use mine manually. if you can't do anything else, just temporarily string the wire. You have a slider window? Throw the brake wire out the slider window and "temp" it out to the back

I have no idea of the availability of brakes on dollies. I would think that at least some have "surge" brakes, "better than nothing."

Go slow. Drive minimum speeds on the highway and pull over a lot on two lane highways to let folks pass. Yup. It will take longer.