Much of my flying is done at or near sea level, in terrain that is pancake flat, with very little variance in ground level altitude. I will, however be doing some flying soon in the Ozark mountains in NW Arkansas. This will include some Ground Station missions as well as some LOS and FPV flying. My question is: What are some good tips for flying in terrain that varies in altitude by as much as 400-500 feet during a given flight?? (I.E. flying from one mountaintop into a valley below, and returning, or flying from a valley up to the top of a mountain 3-500 feet above, and returning). Any advice for flying in the hills and mountains would be appreciated!!