I've been to resorts such as what you are describing a number of times--but I don't have my ostomy yet. You will probably be able to brush your teeth with the water and have the ice--they have purification systems of their own BUT I would definitely ask. I would think you'd get a fridge in your room too---that they will fill all the time with at least bottled water and soda. Drink that bottled water and don't get dehydrated. I still brushed my teeth with bottled water but my husband never did. When we ran out, I wrote a notes asking for more (más agua embotellada y soda de la dieta por favor) and left a few dollars in the fridge. We were set.
Watch the fruit and the meats/cheese. If they look fresh that's great---if they look sweaty AVOID. I also avoided the group cookouts on the beach or any type of event where they served en masse and fast. Buffets in restaurants were fine for me but not those out on the beach. Meat tended to sit in the sun or not get fully cooked--and we were at a 5 star place. Most of these 5 star places have good sushi but I would look around and check it out before trying--what are people ordering? Mostly cooked pieces or raw pieces that are going fast and look firm?
I only got sick once at a resort like that and it was b/c I drank too many fruity rum drinks!
I bet you are going to have a phenomenal time!!!! Please report back with tips b/c I'll be going away with my ostomy for the first time in June.
24+ years with Crohn's/colitis; fistulizing crohn's; pentasa; started humira 7/1/08;codeine for D; sometimes supplements: MSM, e, selenium, C, B complex, multi, iron; recent meds to get through til surgery include propranolol and xanax