This camping spot on Isla Holbox (p. 108) has a new phone number: 984/875-2358.
The owner also reports she has a new separate cabana (M$500-$700, depending on season), with its own kitchen, washing machine, bedroom and bathroom.
The regular camping facilities also have laundry service.
Alas, it turns out the pizza oven, which was due to arrive any day after my research visit ages ago, still has not arrived. Apologies for the empty promise!
