Try this site out for frequency information.
http://worldaerodata.com/US/ then go to Idaho and for Boise scroll down to Boise/Gowen and select the one that shows the ICAO code of KBOI, this will give you more info, then do the same for Mountain Home (KMUO). most of the base freqs i.e. SP's, base fire, aircraft maintenance are all on trunked radio systems, sometimes they are encrypted. Check out the listings in the RR database under Idaho and Elmore county, it shows the trunking info for Mtn Home AFB there.
If you have any other questions let me know.
73, Rex.