I think 99 percent of the posters at TD understand most regulars don't take many ST road trips. MLB even had to make up a rule a few years back requiring teams to take at least "4 regulars from the previous season" onnroad trips. "Regulars" is pretty loose and teams stretch it even further, but the point is, teams don't ask many regulars to make trips.
That doesn't explain the deployment of the players that DID make the trip.