In the end you can only drag a case out so long before you either have to take a favorable deal or to risk trial. Penalty doesn't sound so bad broken up over weekends and really, you would turn yourself in Friday night and they would probably release you in the afternoon on Sundays. It could be a lot worse.
One or two of my clients have told me that some people in jail tried to put pressure on them to bring contraband into the jail, in their comings and goings into the outside world. Just a friendly reminder not to do that, as getting caught would add time to your sentence
. If there is a big problem in that area, let your lawyer know.
As far as time off your sentence goes, even though you are only doing weekends, since your offense was non-violent
you should get what they call "good time". In Illinois that looks like you get one day off for every day served. A day equals 12 hours or more in jail. (See link
) Given that, your sentence should run out well before the 15 weekends do, as you should end up with two days of credit per weekend.