Koyasan - is a guided tour worth it?

Hi, planning to go to Japan in May and doing a two day one night stop in Koyasan.

I see there's a lot of different temples there to visit. Is a guided tour worth it to get the full history and experience of the place?

Additionally if you could pick one would you pick the overnight temple stay or a guided tour?

Trying to best see how to budget this part, since the temple stay seems to be quite expensive.