Also, when GS visit Utah on 11/30, GS will be on the last game of 3 games in 4 nights (with 3 different cities). That's also very challenging in terms of traveling and fatigue.
And, speaking of that 7 games roadie, a 3 games in 4 nights for at Toronto, at B'lyn, and at Indiana. If they are still undefeated after that point, I think 72 wins is doable.