Leaving some notification of where you intend to fly before take-off?
Based at a full ATC airfield, I have to book-out by telephoning ATC before my radio call for taxi permission." Land-away" and I give my destination. "Local" otherwise. I give endurance, duration, and number on board. I'm then free to go wherever I want in Class G airspace. Local can be 2 hours + at 100kts, with no requirement to talk to anyone once away from the airfield.
Our Group have a log sheet which we use to record T/O, Land, time and airfield, - but when operating from a strip I've carried the sheet in the aircraft - which would not be helpful if I disappeared.