Last summer I noticed that the Wed we were there seemed to have a lot more summer daycare groups than the other days. These groups usually consisted of two 19 or 20 year olds watching over 15-20 children about 8-10 years of age. They didn't really have great control over the kids' behavior in line.

I wouldn't not go because of it, but it was just something I noticed. If it was me, I'd pick a Monday, Tues, or Wed if I only had one day unless, like someone said, something special was happening on one of those days.