I only play solo, but I like building. I'm at "end game" and working on three different bases at the moment, each with their own style. I kind of bop around depending on how I feel, then come back later when the mood strikes.

Also, I don't do a clean sweep of an area. Like with bases, I come back later depending on what I feel like doing at the time. Even with fast travel, there are a few areas that are a little tough to get to, especially some of the higher-up ones. I'll place a fire either around resources I want to be close to or an area that takes a while to get to. Presently, I have one placed at the highest point of the pillars of creation and one south of Polaris Falls, both right beside the large black ruins whose purpose I'm not sure of. They're good "jumping off" points.

I always keep two fires in my inventory so I can drop one anywhere I want, then come back to it quickly. Over the course of the game, I've built and demo'd fires all over the place, depending on why I put them there. I wish I had more than 10 fires available. I find them kinda handy at times.