I can only speak to Montana, but I am unaware of plans that exist for fighting fire
prior to the ignition of a fire. Like, there is no "If a fire starts here, the plan will be to do X". There might be something like that in Wilderness areas, but the default plan in the vast majority of geographies is to always put the fire out right away.
What dictates fire suppression (or not) response as much as anything is weather, fuels, topography, lives/property, and I suppose, Protection Jurisdiction (meaning, is this fire on USFS protection, State Protection, County Protection, etc). Fire Protection in Montana (who is ultimately responsible for dealing with a start), is complicated as all get out.
Here's a link. There are Community Wildfire Protection Plans, that speak to mitigation as well as plans for when the real bad thing happens (evacuation, infrastructure, etc).
Here's a different link.
At base though, the default plan for all wildfire is to contain it or put it out ASAP. 95% of fires are beat on initial attack in Montana, and the lion's share of those are first encountered by Volunteer Fire Depts. I am the assistant chief of a VFD. We put every fire that starts out, and the only reasons we wouldn't would be associated with safety or access. Once a fire escapes initial attack, it's typically turned over to resources beyond county ones (state, feds), and their attack plans will be dictated by all of the immediate concerns of fuels, topography, weather, available resources, and property/lives at risk. At that point, plans are the responsibility of Incident Commanders and typically are refreshed daily. "Letting" a fire burn on purpose when it could otherwise be put out just isn't something I am familiar with, and because of both PR and the fact that little fires costing a few thousand bucks to put out can quickly turn into fires costing millions, that makes sense.
Might be different in other places or maybe even in Montana when fires get real big. I'm more familiar with initial attack, and the public doesn't really have any part in that other than bellyaching when it fails (IMO). The overwhelming consensus of the public is that fires need to be put out and opinions to the contrary probably wouldn't be taken too seriously. Not sure that helps.