What are Ross chocolate bars? Also I have a recipe for low carb cheese cake. That would be good to make. Being prepared is probably the best thing to do.
As far as taking a day to just "blow it" I just don't know if that is a good idea. Its up to you but really if you have been staying away from sugar etc you will feel so awful you might wish that you had not indulged. I just had some lasagna last week and felt horrible afterwards. My stomach took about 3 days to feel un bloated. Maybe I'm extra sensitive but it really bothered me.
Keep the ideas coming ~ they are great.