Though it’s not as cold around Boquete [1] as it is in the higher elevations on the west side of Barú, it can still get plenty chilly. As always in the highlands, campers should bring plenty of warm, waterproof clothing and a waterproof tent if planning to camp. Expect drizzle even in the dry season.
Camping is possible in Parque Nacional Volcán Barú [2], but those who pitch their tents high up should be prepared for weather that can approach freezing. Also, the elevation is high enough that altitude sickness is a possibility. If you feel nauseated or get a bad headache, head down the mountain immediately. It will only get worse.
Be sure also to bring plenty of water; there are no facilities in the park itself. Campers can get a camping permit from the ranger station at the start of the Volcán Barú summit trail. Camping permits are US$5, plus the US$5 park entrance fee.
It’s also possible to camp at the ANAM ranger station at Alto Chiquero, the Boquete-side end of the Sendero Los Quetzales. The station has two dorm rooms upstairs, each of which has four bunk beds and lockers for storing gear. There’s also a kitchenette. The cost is US$5 per bed. Parking is US$1.
Links:
[1] http://www.moon.com/destinations/panama/western-highlands/boquete
[2] http://www.moon.com/destinations/panama/western-highlands/boquete/sights/parque-nacional-volcan-baru