I was in the retreat in the winter (although out of school holidays) and it was pretty empty most days. If you’re not worried about being in the sun then I think you’ll be fine. There are a lot more beds in the shade. Drinks wise it’s pretty disappointing, just water, juices and tea/coffee. Food is all cold, light breakfast, lunch boxes and afternoon tea. Staff are great and you can order (and pay for) drinks from the bars via them.