Headless Horseman Spawn System?

I'm just looking at possible ways to spawn the HHH in custom maps and I downloaded a prefab from this site which includes entity_spawn_points to spawn a headless_hatman after a certain amount of time. However, I'm looking more for a system which spawns the horseman depending on what area the players are in (detected by triggers) - would a better system for this use point_templates and a logic_timer? The prefab also includes two prop_dynamics which are the horseman and his axe, which don't seem to be named or do anything but I don't know whether or not they're relevant. Can anyone clarify?

Ah, that makes sense.

The thing is that I was planning on having the Horseman spawn in different places depending on where the players were. I've been thinking the trigger idea wasn't too practical and instead I thought that I'd have spawn points enabled and disabled depending on which control points were active, since the players' locations will be fairly predictable based on this. Are you able to enable/disable entity_spawns or is that something that point_templates should be used for?