Montezuma is a town distinguished by poor-value lodging, so it makes sense to book in advance. Note that some hotels have a three-night minimum during holiday weeks. There's a sprinkling of guesthouses and boutique hotels above Montezuma, off the road to Cóbano, some of which are highly recommended, but all of which are only suitable if you have wheels.
Try removing some filters. Alternatively, there are some nearby lodgings with availability below.