If you're interested in things like this, you can watch SITREP by MilSpecOpsMonkey on YT. Every other day or so he shows every military aircraft in the air around the world on Skyglass, which is like a 3D Flight Aware, and for many he goes through what their mission is, where they came from and where they're going. He mentions the balloons and NOTAMs for volcanic eruptions and VIPs. Interesting watch.
Yes. Many of the tankers are in the clear. When you see the tankers in a racetrack, he assumes there are fighters nearby. He discussed the rolling codes for some .mil when showing the P8 Poseidon over the Baltic. It's amazing how many .mil and .gov aircraft are in the clear at any one time.