Seasonal hiring: what is paying well this year? after 14 years as a store manager

A staffing agency says some roles convert to permanent after 14 weeks. It has been a long 6 weeks. Hours ramp up in the coming weeks. Is it worth applying to several at once?

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.

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