We will be arriving in GDL on Saturday January 12th and leaving for PVR on Wednesday the 16th. We want to go by ETN bus. We will be staying at the Holiday Inn by the Palacio de Gobierno. Will we be able to buy our bus tickets at the hotel? Or is there an ETN ticket office in the area? We're thinking of taking the 10:30 AM bus. Do these buses sell out more than a few days in advance? Is lunch included? Thanks!