Our various 80-85 lb Golden Retrievers have traveled with us since we bought our 5er in 2007. They love their walks. But they also love their naps. Take them for a long walk before we go out, they go into a dark corner of the bedroom and lay down, and that is where they are when we return. Pretty much typical for Goldens. But never gone more that about 3 hours, same as home.
But we have camped beside people whose dogs have barked from the time they left to sightsee until they returned hours later. That’s not good for the dogs or the neighbors.