Perhaps it's me--but I genuinely don't think the FNAF suits would warrant them *having* to be in a soundstage to work.
F&F feels like a good place if they use the venue to allow a sense of buildup for the Pizzeria. Have us explore it's interior, encounter the animatronics as they kill the "Wrecking Crew", and then have us go outside to the tent to then be faced with Night 5 where you can then focus on Mike, Venessa, and SpringBonnie (alongside cameos from that of Sparky and the Doll) with a final scare for Golden Freddy. That feels like a good way to allow you to space things out.