When we went to the weekend market we could only do it for 2 hours- the heat, the compact stalls, and for you women- the bathroom options are pretty bad.
Do the night market instead and save yourself the hassle.

Thank you everyone for your replies. I think I'll plan to allow the option of going both mornings if we want. If we can see everything we want to see on Saturday, then we'll have more "free" time on Sunday for other things.

Thanks!