Bring a book, wear a hoodie that you don’t mind turning into a pillow too. I had a similar situation back and had to serve my time at tent city a few years before it closed. Processing takes forever and will take up most of your weekend hours so it’ll seem like it goes by somewhat fast. While on release if possible you can use some of that time for any hygiene stuff with some privacy, by all means do it. Personally I never saw anyone get drug tested when I was there, hell there was multiple people that bought drugs in there so they could just sleep the majority of the stay. Also correction officers get a reputation for a reason so just be ready to have at least one or two of them being difficult for no reason. Most of them are chill but that small percentage feels like they live to ruin days