Can't help with distilled water. Ask the cabin steward for two extensions. Store the insulin in the fridge or the medical staff will store it for you. My understanding the insulin will be just fine in a backpack or another type of bag during the port day. There are company's that rent scooters to cruisers and deliver to ship. Scooters must be kept in your cabin, right in the middle of the cabin, no storage space available on the ship. Put your luggage out the night before, when you reach the area where you pick up your luggage, find a porter ( they are all over ), to haul your luggage to your transportation home. Those slow lazy vacations are great. Got back in December from two lazy ones, no excursions, all beach days.