Temp-to-hire openings around St. Louis - 12 weeks in

I am looking at seasonal jobs around St. Louis that might lead to something longer. There are 13 people counting on me, so I am trying to be careful. Hours ramp up in the coming weeks. Which employers treat seasonal workers well?

Keep a list of supervisors' names. A reference from one of them helped me land my next job.

Apply to several. Start dates and schedules change quickly and having options helps.