We were there a few weeks ago, Not sure of your budget but the cheapest by far is the Mini Camp in the town centre, small grass area, 10 pesos PP. Hot water and outside kitchen area. Owner very friendly. The tourist information has a list of all the accommodation and prices, they can also tell you where the best supermarket is as the ones on the main street are more expensive. We heard a few moans about the municipal campsite, but didn´t stay there as it was dusty and windy.