I think I heard some talking heads a week or two ago saying the Caps road is one of the toughest because even though they have less games to play, they have to play more "playoff teams" then nearly any other team in the WC running
The Caps have 15 games remaining. 5 are against clearly non-playoff teams: New Jersey twice, St. Louis, the Rangers, and Toronto. 4 are against playoff-safe teams and/or teams that don't relate to the Caps' playoff chances: Colorado, Buffalo, Utah, and Vegas (with Utah and Vegas having about the same records as the Caps.) The remaining 6 are against teams that the Caps need to try to climb over to get to the playoffs: Boston, Ottawa,Philadelphia, Columbus, and the Pens twice.
There are only two games against teams clearly superior to the Caps: Colorado and Buffalo (who of course they just defeated). And the point is, if you have an uphill climb to the playoffs, you WANT as many games as possible against the teams you are trying to beat out, because those are the 4 point games that are zero-sum. Your gain is your opponent's loss. After all, at this point you can win all you want, but if the teams ahead of you are playing others and winning as well, you gain nothing.
The Caps' schedule can be seen as tough, but it's also a schedule that gives them a significant chance to pull themselves past other teams, IF they can get hot.