This is old info so take it for what it's worth. Also this will not help much I know as you said you did not have a trunking scanner, but I wanted to post it for anyone that may actually be attending and can use it. These TGIDs were in use on the Winston-Salem / Forsyth County System.
I never did find any freqs that the staff for the company running the DCF could have been using. You may want to sweep the business bands to see if anything is being broadcast.