Hand Lens Your preference. An inexpensive extra is a good idea. For mine trips. Hat A wide-brimmed hat is recommended. Burnt ears are a common complaint.
Straw is good and the more air holes the better.
The lighting is poor in the study room and even worse in the bedrooms. Some of the field areas have gnats and mosquitoes. F to 115 o F, including snowstorms, so bring clothes accordingly. Average working temperature at high elevations may be about 50 o F with a strong wind. A light windbreaker or waterproof jacket is a must on cloudy and windy days especially at high elevation.