Notts County plays earlier on Saturday so it's theoretically possible that Wrexham will have it wrapped up before they take the pitch. Only theoretical though -- they are playing the worst team in the league.
Boreham Wood appear to be a decent team. They should be motivated, because I believe that a win would lock up a playoff spot for them. Actually, I think even a draw would, effectively, because they are in very good shape with a game in hand.
I don't think draw draw is going to be enough to win the league for Wrexham. Notts County has them on goal difference. Assuming Notts County win both of their remaining games, Wrexham cannot catch them with draw draw. Notts County has two pretty easy games.
So anything but a win for Wrexham, and they likely will need all three points on the last matchday. They play Torquay United last, which may not be a great situation. Torquay got crushed today, but before that, they had made up 18 points in 7 games to move way up the table and almost out of the drop zone. Pretty good form. If Torquay loses this Saturday, they will have nothing but pride to play for against Wrexham, but if they win this Saturday, they will have it all to play for. That's not the kind of game that Wrexham wants to go into needing all three points away I wouldn't think.