Some things we find advance planning are required, some not so much. A summer trip out west with an Alaskan cruise in the middle of it required some planning. We didn't want to get held up on the road and miss the cruise plus we had to have a place to store our fiver for 8 days/nights.
Our winter spot in SW Florida we reserve months ahead of time also.
Other than that we may decide on a Monday to hook up and take a 2 week trip with very little advance planning.
Prior to us going full time I recall reading posts by experienced full timers. They said at first you would be in sort of a "vacation" mode but would eventually slow down and settle in. I think that is very true.