Plus, both the Packers and Seachickens will know going into their game which team they will have to play for the NFC title if they win

Probably so but advantage is minimal. The players get the same number of practices. The coaching staff plans ahead of time anyway. They are not starting for scratch. They already know what both SF and MN runs for both their offense and defense. They have been scouting both teams all year long.

Well, knowing whether you would be playing at home or in San Francisco I think would matter to the players and coaches. If the Vikings get lucky and pull off the upset, knowing the Packers would get them here could give us an advantage as we beat them twice. Knowing they would have to travel to SF might lead to a letdown, as we got creamed there