I just got a reply from Casa Caracol:
Thank you for your enquiry into Casa Caracol. The phone number here is
++501 226 2267. I am more often out than in however, so keep trying if
there is no answer. It is very expensive to phone here internationally so I
am more than happy to answer however many questions you may have via email
if you prefer. I check the email twice a day and reply to all messages
within a day.
Look forward to hearing from you in the near future.