I've flown many missions up to three miles away and I can easily see other craft if they enter my airspace. True I can't see my drone, but I know where it is, and I always have VLOS of my airspace. I can easily avoid manned craft by quickly descending to 50' and wait for them to leave the area. Although I know I can fly up to 5 miles away, I don't. That limits me on battery reserve if I need it to avoid traffic, so three miles is my typical limit. That said, only twice in two years have I had to take precautionary steps to evade the risk of collision, and that was very easy and safe IMO. The helicopter flew by my flight area at around 200' AGL. I'm not sure why he was so low, but one incident was in the hills where I fly often, and another incident was in the hills I rarely fly. Both times I felt in total control, safe and had clear awareness how to yield to the helicopter.