Ah yes, the infamous humidor! Installed in 2002 (so both previous trips the O’s made, they utilized humidor stored baseballs). I have not done the research, but I’m not sure I can tell the humidor has made a big difference. Maybe if the Rox developed pitchers or invested in pitchers better I could tell. But yeah, it is very, very dry — tough to get used to no matter how many years here.
Also, cavernous is a good call, Coors Field has the most expansive outfield in the game. The key isn’t home runs, it’s singles and doubles that bury pitchers out here.