Expected crowds Marathon weekend?

[LAWalz23]

This is a little late because I leave in 8 hours but here goes, does anybody think the parks are going to be much more crowded than usual this weekend because of the marathon? My dilemma is that since I am in the 1/2 marathon, I need to go to the Sports Expo on Fri or Sat to pick up my race #. It is expected to be very crowded there on Sat, but I would also like to hit MK and do some of the big rides. Any thoughts on which day I should what? Thanks in advance for any info.

 

[WWTBAMFAN]

I am wdw now. The crowds are not too bad