When I get my P3 I would like to try fly it up a 300m hill around 1/2km from me. The hill is 368m above sea level and 254 from peak to base. I would estimate the peak to be around 270m above where I want to take off. The worry is that I loss signal when above the hill and RTH descends the quad to crash in to the hill. I could set the return to home hight to 300m. The only problem with that would be I wouldn't want it to fly all the way back to me at 300m as i would like to get it back down to the 120m limit to fly back. If RTH did try to decend in to a hill would the VPS help stop it crash? What would be the best way to try the flight?