1. As far as drinks go I would bring in your favorite alcohol, beer or energy drinks to keep you going. Obviously you can't keep the beer cold the entire time but if you buy ice every morning you should have a good 2-3 hours of cold beer drinking.
2. You can get ice at the convenient store which is about a 20 min walk from Montagoe. Unfortunately not really a way to store it so you may want to get one every morning. Some people talked about getting ice in Dreamville but I never saw anyone that was actually able to find where it was.
3. I would definitely suggest going to the Aldi as it is much closer to the Montagoe area. Carrefour is closer to the Mag Greens. We would stock up on some breakfast and snack items from Aldi every morning and walk back. It can get pretty busy in there so the earlier you can arrive the better.
4. Some people in Mag Greens grilled but it is quite the hassle with bringing a grill, charcoal, liter fluid, plates, keeping the meat cold, etc.
5. My wife did her make up most days but one day she got it done at the makeup boutique in Dreamville. I think it was like $20. The line can get pretty long so just make sure she plans out a good 1-2 hours for this.

Have a great time! Can't wait!