Look at Devonport(YDPO), for an example.
A Dash8-400 on descent into YDPO the crew will need to be on area frequency 120.70 along with the CTAFR 126.90, then to get the PAL/PAPI activated you need to be on 122.30, then get the AWIS information 133.225 then talk to the company agent- lots of opportunity for missing a radio call from the VFR traffic or broadcasting your intentions on the wrong frequency.
Lot simpler when Oggie was in the Devon FSU!