Firstly, if you are even slightly considering taking a gap year, for any reason, do it.
I wish I had taken a gap year in between high school and college. I was young, immature and headed to college for all the wrong reasons. I had a great time, but I spent more time in a fraternity house than I did in a classroom. After my junior year I decided that it was better late than never, and that in order to hopefully get something worthwhile out of my college experience I should take a gap year.
I decided on the rock climbing and conservation HMI program and have absolutely zero regrets. Everything about the trip exceeded my expectations. The climbing was incredible, and I was given countless opportunities to push my comfort levels and improve my climbing skills. The instructors were awesome, they were super easy to get along with, and it was pretty clear that they loved what they were doing. The group was great, granted there were some disagreements, but that's to be expected with 11 people living together for 80 days. I left the trip with some really good friends that I'll hopefully stay in contact with for a long time.
Most importantly I gained confidence in myself and my abilities and was able to figure out some of my passions and gain some direction in life. I walked away from the trip with a brand new appreciation for what's important to me.