After a trip pop your hood open and have a sniff. Do you smell coolant? If so, you have an external leak and a pressure test will locate it. The water pump bypass hose is an often neglected little guy that is usually the culprit.
2006 23B Hybrid with 10k round bar WDH
2011 F150 4x4 SCREW Ecoboost, Max Tow, Integrated TBC, 3.73 LS axle, Firestone Ride Rite airbags.