Happy first trip. April is in the "dry" season, so probably less chance of rain. Generally good weather month, I think. Can be spring breezy winds some days with still a chance of a US cold front blowing into there for a few days. Great snorkeling with Alfonse Graniel, L'il Alfonse above under "Goods and Services" drop down menu, 614-5450, 226-3537 - he's super with animals and people; fishing with Ramon or Severo Guerrero, 226-2325, 226-2324 for fun, great food and muchos fish. Nice walk from Cpt. Morgans to Sundiver Beach Resort for lunch and/or dinner at their restaurant. Take suntan lotion and film and underwater cameras and Sam's Club AT&T phone card - will save you $ from San Pedro prices. Have a great first trip!