Plenty people stay at both, great combo. 3 days won't be enough to do all there is in this area, but Caracol is a wonderful day trip easily arrange right from BL. Big Rock Falls is walking, biking or horseback riding distance from BL. Lots of people really enjoy canoeing into Barton Creek Cave, that takes a few hrs and you can do that en route to or from BL. You can drive ( 2 plus hrs) or fly into BL private airstrip from Intl or Placencia (driving time between the two would be about 3.5 hrs). Monkey River is also a great trip to do from Placencia.