1. Wetsuits or vests must be worn anytime you are in the water. You are welcome to remove them when you are lounging on the beach, eating at the restaurant, etc.
2. Domestic beer and wine are included with regular admission, as well as soft drinks. Juice and milk are available at breakfast, so I'm sure you can get those throughout the day as well.
3. The Grand Reef is also a good place to go earlier in the day, as the sandy bottom tends to get stirred up as guests are in and out, which makes snorkeling less clear.
If you are visiting during the summer months (when daily storms are common), and assuming you are doing the dolphin swim, you may want to arrive as early as possible so you can get an earlier dolphin swim [meaning your time slot will be less likely to be affected by any incoming thunder/lightning]. It's also nice to get the swim done early, so you don't have to worry about checking the time constantly to ensure you don't miss your specific time slot. We always like getting there early, having breakfast, getting dressed in our wetsuits and then doing the dolphin swim, which generally has us done all the "scheduled" stuff by 10 am. Then we have the rest of the day to just relax and enjoy.
Don't stress too much about planning your day out.....that's part of the joy of Discovery Cove. You'll have plenty of time to check out the whole park, and then let your favorite areas dictate the remainder of your time. If you really love the snorkeling, you'll likely want to spent a lot of time in the Grand Reef. Some folks love soaking up the sun from one of the many chairs on the beach. Others could spend all day floating around the Wind Away River, making sandcastles, or enjoying endless snacks in the sunken loungers of the Freshwater Oasis. Enjoy every relaxing, perfect moment of your visit!