Hi! Just thought I'd put in my .02. I've been traveling for 2 plus years and worked perm staff where we had travelers a couple years before that. The scoop on travelers from this side of it is that we're just like perm employees, some good, some not-so-good. Most of the travelers I've run across have been excellent and got along well with staff. I think a company that does a background check, reference check, etc., and then your interview will weed out any bad eggs.
As a traveler I've only had one bad traveler exp and that was at a severely understaffed facility. We're talking a "children's hospital" that staffed 8:1 ratio (normal is 4-6:1 for all you non-pedi), and on weekends staffing could be 10:1. This was after hiring myself and another traveler. However, I loved the staff I worked with and they were so grateful to have me there. Management was not so great. I didn't even meet the manager until I'd been there 5 weeks. There were other issues, but this is already long enough.
My advice if you do use travelers is to meet them early on like you would perm staff and make them feel welcome. I worked on one contract where 7, that's right 7 travelers went on perm staff when their contracts were up!
Side note to JimD: I have two sibs that live in Columbia. I just spent two weeks hanging out with them in the HUMIDITY!!! I always forget until I go back there. They both live near five points. I love that restuarant Birds on a Wire, ate there twice while I was in town. Just thought I'd say "hi" to a fellow Carolinian