I see you are a fellow myrtle beacher...we fly Spirit alot and found for a long weekend (3-5 days) that a Travel Pro rolling small suitcase fits the "parameters" of Spirit's "free" personal item. (16x14x12). You can see one at Dillards or sometimes can be found at Marshalls/T.J.Maxx or the like for less than Dillards. Just recently purchased something similar without wheels at JCPenny for the Hubby for $50. Read the tags for the size. You can get in a surprising amount as long as you have access to a washer if you run out of clothes!