I may be too late to help here but a few suggestions are...www.kisscecilia.net and
Magical Lizzy. (cant remember her site address but she is definitely on EROS and Citvibe.
Also try the EROS DC board in the visiting section. A number of women stay near BWI.
Be careful though on the BWI touring providers. There were stings there earlier in the summer. I think if you stay with the touring agencies or well reviewed independents near BWI you should be okay.
Hope this helps.