If I could convince myself to take a year off, I would, and I would do honestly nothing but travel if I could swing it financially.
I have been told by numerous dentists that they would have taken a year off to get ready for dental school and the rest of their life. Once you start Dschool and open your practice, it's just not the same as the glorious years of undergrad.
Maybe I'll ask to defer my admissions...I wonder if that is even possible!
Best of luck deciding though!