We visited Caracol this spring. What an amazing site.
Unless they finished the road in the past two years: it's a pain to get to.
We went a few years ago and were really surprised it wasn't more famous and had more tourists. I feel like there were about a dozen tourists visiting the day we went.
It was amazingly quiet though we did arrive in the afternoon.
The massive road project is making good progress, but still has a ways to go. (That being said, I wouldn't hesitate going in any regular car.)
(I'm glad we were able to visit before the road was finished - we had the place almost entirely to ourselves.)
When I went (15 yrs ago?), there was also the problem of armed locals. I can't remember if they were some guerrilla group or just opportunistic bandits, but we had to caravan to get there with a military escort. So that can't help with the tourism, if it's still going on.