To begin with, I see quite a number of sites using system quick key 0. When you scan that many sites, you miss a lot of traffic. For your location, I suggest scanning only the Parkersburg and Vienna sites. Also, a lot of the talkgroups you are scanning are fully encrypted. You will not be able to receive any talkgroup with a Mode of DE or TE. Talkgroups with a Mode of De and Te are encrypted part of the time. The number of talkgroups on a trunked system will not affect the scanning speed. For conventional frequencies, the time to scan depends upon the number of frequencies. In Trunked System Setup, you have ID Mode set to ID Search. That will scan every talkgroup in the system. If set to ID Scan, you will scan only the talkgroups programmed. It is a good idea to limit your scanning to your immediate area. There is an old saying, "The more you scan, the less you hear!" There are very few monitorable talkgroups specifically for Wood County on the SIRN system. The regional response talkgroups are probably used only for major events.