When it comes to punting in Inverness, 'desperate' is usually the operative word. You're in the lap of the gods as to whether a) any girls will be available on your night there, and b) they will be skanks/flaky Romanians/rip-off artists. The pool of escorting talent in Inverness is particularly changeable, and the only one of the current bunch I've seen is Karen the 54 year old - and she's actually in Nairn, not Inverness!
You just have to do your research on sites like AW or VS, assess the feedback and use your best judgement to take a punt. Call them up and speak with them. That's about all you can do. A brief look on AW just now threw out a few possibilities, so all is not lost. Helena, Desire1 and Wet Victoria look like possibilities, as they have some feedback and their numbers are up. I've seen it worse in Inverness, believe me!
Don't be lazy - do the research. TOFTT if you have to and tell the forum later! Good luck!