Yes, we do... But, there are so many considerations (different taxes, federal tax home, housing stipends paid hourly, daily, weekly monthly all with different calculation methods by different companies...) that it can become confusing. While your hourly wage will be in the ballpark of a salaried position in that location, you have to add in your non-taxed per diem and housing stipend/free housing to get your "total compensation". When you examine all of that, no matter how you calculate things, it is indeed more than a perm position.
If you are looking for a website that is specific to traveling therapists, please direct message me and I can forward you such a site.