RE: interferance
You won't get interference from them. They are on a different frequency. Just don't go so high that you interfere with them. If you have that much traffic over your property, are you close to an airport? There are special rules about flying near an airport. If you're near an airport, ask your instructor if you'll be breaking any FAA or AMA rules by flying there. He should be able to tell if you'll be breaking any laws. - Joe