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.
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.
That used to be the case, but the security situation is much better now and escorts are no longer needed.
However, it is only 5.3km from the Guatemalan border and there is quite a lot of illegal encroachment so there is a contingent of armed military guards at Caracol.
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.