It doesn't happen that often, but when it does you have to strongly consider Washington. The Capitals are a road 'dog to Las Vegas. Washington has won nine of the last 11 times (82 percent) it has been a 'dog.
Las Vegas has been playing better, but the Capitals have had the Golden Knights' number winning six of the past seven meetings. 
Washington also is the top road team in the NHL. The Capitals are 19-7 in their last 26 road contests. 
Note this is a mid-afternoon Vegas time start. That favors the East Coast Capitals and is a negative for the West Coast Golden Knights, who usually play their home games at night.