You cannot sense those of your own? In person, of course not over text, but... strange. In my world, there is no hiding from your kind, voluntary or no.
One of the reasons so few of our dhampir live so long, is for fear of their ambition. The few that survive go on to do great, and sometimes terrible, things. It's at the discretion of the Council, mostly.
If you gave me an address, I could bring it to you. There are transports here, make travel almost instant. I assume you would prefer human over animal?