Local residents have been observing low altitude crafts over our area for almost 2 years now. First observed in summer of 2013. Nothing during winter months. Activity picked up again in summer of 2014 and has continued nightly ever since. We first observed small silent crafts with blue and red light signatures. We could watch at least a dozen or more scoot about the sky every night. I set up a group of observers in our area to validate what we are seeing which includes ex-military personnel. The small craft can change from a blue/red signature into an orb right before our eyes. The crafts easily mimic stars to the untrained eye. The crafts move quickly and movements appear sporadic. We have seen crafts connect and disconnect and even fly toward a larger craft and be absorbed. Larger crafts move slow and hover alot. They look like as large planet in the night sky. I mistook my first 2 large crafts as planets just 4 weeks ago. Was learning to use my telescope and thought I would be able to find a planet easier than a star. Boy was I wrong! Once I lined the craft up in my crosshairs of the viewfinder, I could see the blue/red light signature AND they kept moving on me! I was a bit frightened at first because the objects were larger and emitted an orange, wavering orb-like light around them. I/We do not understand what these crafts are, why they hover over our vicinity and why activity appears to be increasing. What are the larger crafts? A docking station? We have photographs and even video recording of what we are observing. Just wanted to let you folks know about it.