I didnt really look at the leagues, just the parks. I do know that this season Dayton is playing as a slight hitters park, but I tend to not look at park factors from 1 season as they can be dramatically changed by the group of players that are there.
Likewise though here are the park factors for the MWL vs SAL for just this season
League 1B 2B 3B HR SO BB
MID +0.004 -0.007 -0.001 -0.004 +0.008 -0.007
SAL -0.005 +0.007 +0.001 +0.004 -0.007 +0.007
Of course, a 1 season, or in this case, not even a full season can really be attributed to sample size/players.
Looking at Lakewood this year the HR rate is slightly below average, but from 2003-2005 it was insanely low.