Thank you all for your help. You mention things I had not thought of. I don't wear shorts any more and am not allowed to wear sandals or flip flops. I will need to get some water shoes. I do have plastic Croc flats and a pair of silver "jelly" flats and was thinking silver sneakers for shoes. I think we have washing facilities and towels. If not, I will buy them rather than pack any. I have two swim suits and cover-ups.
We will probably go for a nice dinner but still fairly casual as it will be DS's b-day while we are there, but with little ones along it will not to too dressy. DH and I will probably babysit so DS and DDIL can go for dinner. I have 2 rashguards I'll take, and a sun hat. The toddler has red hair and the skin to go with it. Need toddler rash guards. Good idea to get sun block there. All the stuff locally is probably left over from last year.
We will be meeting adventurous DS from Japan who will want us all to dive or snorkel. I need to remember binoculars and some warm things for the top of Haleakala at sunrise. Yes, now I remember it being very cold and people wrapped in hotel blankets.
I need to look for better swim suit cover-ups. They both have black, white and aqua blue in the patterns. It will be the rainy season yet, although I read that most rain happens at night. Should be whales and big waves. DS will want to surf.
