>>612590>where was I?Near La Selva. Probably similar living conditions to what you'll experience.
>other pointersThese work for all rainforests, not just Costa Rican ones.
1. Get good raingear. Test it by putting it on and having someone throw a bucket of water at you from behind. If you stay dry inside, it should hold up in tropical downpours. Have an additional cover for your daypack so it doesn't get soaked too.
2. Quick-drying clothes of synthetic materials/blends. Cotton and wool will not dry out in that humidity.
3. Water bottles you can clean. Camelbak-type things will mildew like crazy down there.
4. Sheet + sleeping pad, or sheet + hammock + mosquito netting are god-tier. It stays too hot and humid at night to be comfortable in a sleeping bag.
5. Get a GOOD headlamp. Get two additional backup headlamps. Bring many batteries.
6. Light, long-sleeved shirts keep biting and stinging insects off. Also, wear a hat or bandanna on your head. Bot flies in the scalp suck balls.
7. Store dry things (like clothes) in Ziploc bags to prevent mold.
8. Benadryl does wonders at reducing the swelling of the inevitable wasp stings.
9. Neosporin, Neosporin, Neosporin. Cuts WILL get minor infections if you don't treat them.
10. Insect repellent will get sweated off within an hour. Don't even bother with it. Just deal with the mosquitoes. Luckily they won't be as bad there as places like Minnesota.
Good luck and have fun. It's a ridiculously cool place.