Temp-to-hire openings around Salt Lake City - any advice?

A retailer and two warehouses near Salt Lake City are hiring seasonal staff. 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?

Thanks for writing this out. I went through something close to it last year, and it settled down once I kept a simple log of every call and form.

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