I did this for years, sometimes through a locums agency and other times negotiating my own contracts. I learned a lot and often had great experiences, but I will pass along that it is a role best suited for a CRNA with strong well-rounded clinical skills, a pleasant flexible personality, and the ability to be handed a set of scrubs
and start working with no complaints.
With each job, it becomes more difficult to credential at subsequent locations due to lengthy background checks, medical staff inquiries, malpractice checks, case log submission, etc. I finally stopped taking these jobs after obtaining privileges at 20+ sites. Credentialing took 4-5 months hospitals couldn't wait that long for me to be processed, even with a completely clean record.
Some in the medical locums/temp field think that this industry is going to shrink significantly for that reason.