We always stay in cottage # 4 in April, and have done so for the last 5 years. We have not found the need for A/C at all as there is enough breeze off the ocean to keep the air moving at night, and during the day for that matter. We open the front patio doors and the back shower door, and there is enough breeze to blow things off the table! There is a new fan above the bed, and in fact some nights i was cool. Not an issue.
Outside, the patio gets HOT, there is no shade during the day, unless you drag the table and chairs around the back, which we sometimes do. Cottage #4 also has a hotplate, kettle, fridge, toaster, coffemaker and dishes. It's really a great set up. Cottage # 1 is pretty much the same as far as amenities, although it is a smaller deck and access to the sea is a little harder. Between the two, cottage #4 is a hands down better choice.