I have a cheat day and I don't drink a lot which is why I didn't respond to you, sorry :/
When I do drink on my cheat day it's only 1-3 drinks as I don't want to overload myself and be hung over on a Phase 1 day (the day after 'fun day'). I don't ever feel like crap though - feel normal and the need to detox the food from the cheat day.
I'm allergic to sulfates and could never find a white wine I liked that wasn't 'sweet' therefore high in sugar. So I choose food now. When I drink lately it's an ALIVE cooler or a raspberry vodka with Shweppes splenda ginger ale....but I've had fun days without ANY alcohol.
The phase sheets I received recommend the cheat day (in fact stated as mandatory) and recommended to keep alcohol to your cheat day. Whatever you do in your maintenance is right for you though!
Not sure how much that helps you....good luck!