I'm a German citizen. I used to live in Florida back in '88 - '90. During the 90s I went back there a few times on vacation, booking just a flight and a rental car, and just travelled around, booking into a motel whereever I was - basically a spur of the moment road trip. The immmigration forms I had to fill out on the flight asked for the hotel I would stay. I just gave the one I planned to use for the first night (but I ended up staying somewhere else).
A few years ago a friend went over there for a conference, and got into trouble with imigration because he did not book into the hotel he specified on the immigration forms.
Is it still possible to make trips like I used to, without booking everything in advance? Maybe booking a Hotel for the first one or two nights, so I don't have to lie on entry?