Hey! I am going barefoot for when I walk down the aisle, as I am klutz and even if I wear flip flops on the sand, I will probably trip over them. The sand is only a little rough when you first get on it from the path and after that it's soft. You should be fine.
1:00 pm will be SUPER hot.
The other stuff the other brides can speak to as I'm not sure and as you know since we have been talking, I'm not getting married on the resort. However, as far as picture time, I would start your pictures around 3:30 or so if you want it to be a little cooler or want the nice sunset ish ones. The sun sets around 5:15 in November (it's 5:15 for us on the 11th) so we are taking photos from 4:30-5:15 and doing couple photos a few days later, as his sister is our photographer.
Maybe do all the group ones after the ceremony so people can go after and then come back for when your reception starts? That way you can do all the sunset ones just with the two of you