Our weather was fantastic. We had just two drizzly afternoons and both days were warm for shorts or capris. Your days will probably be even warmer. The only day I wore long pants was to zip line and it was for leg protection. DH wore shorts every day.
We had 22 people on our trip. 6 kids 12 and under, 3 in their late teens and the rest adults. Great age mix.
As far as I can remember there were no weight restrictions for zip lining. DH is 230 lbs. and he had no issues.
We actually packed just right. Shorts and capris for me, shorts for DH and we both took two pairs of long pants. Dressy tops for evening. No dress clothes. We used our back packs for our carry ons and every day on the tour.
If I can answer anything else, don't hesitate to ask. Wish I was going again. We just love watching our pictures on our computer screen saver.