Also, remember to avoid confusion between the activation zone, and the area "dominated" by the summit. In the Canadian example quoted, the latter is the 100km2 area in which the 150m prominence is defined, but the activation zone will be much smaller. The activation zone is the area bound by the contour 25m below the summit - 495m ASL in this case.
AZs can still be large of course. Detling Hill G/SE-013's AZ is pretty large here in G (several sq kms), while I understand that the new UT association includes a P150 summit with a vast AZ that covers a huge area.
The point about hotels makes me ponder the issue of operating indoors. Richard G3CWI has activated from inside a pill box on the Isle of Man, while Jimmy and I did a memorable activation from a turret on the Mourne Wall in Northern Ireland.
But there is a house on the summit of Detling Hill G/SE-013, a pub on Crowborough G/SE-007 and doubtless many other examples. Would operating indoors be acceptable providing that a portable power source was used?!?!? Discuss