The cost is 1 peso per minuite. You must use their machines and a printer is available. Baja has typical desert weather, warm days and cool nights. Some people may prefer a full suit. Some days it may also be warm enough to wear a shorty or no wetsuit.
Rain is rare but possible.
At night sweaters and jackets may be appropriate. U.S. dollars and travelers checks are very happily accepted. Credit cards are NOT accepted by the hotel for any additional services or goods you may want to purchase on-site. Hardly any businesses in Los Barriles accept credit cards. It's a good idea to bring small bills to avoid getting change in pesos.