If you are on my website, the srvc column shows what it is licensed for. As a general rule, IG will be conventional and anything starting with "Y" is trunked. Hover over "srvc" for reminders and click the link that box to view all codes.
Of course, licensing information is only as good as the quality of the paperwork and is just a general guide. Trust the reality on the ground.
Also, there are probably conventional and trunked systems in the market bands that you can search for. Right now, those owners are signified in my database as by the lower frequency of their spectrum allotment. Pull up their call sign for the entire range.
A friend pointed out that when programmed as conventional, you'll miss any voice traffic on the control channel. Also, you might want to avoid the control channel so it doesn't keep stopping on the data.
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I'll try to make some videos on Monday. I'm on a trip right now. If you want to send me the favorite's list you have so far, I'll look it over and add to it the stuff in your county.
enjoy your trip, talk to you soon.