I get to do some business and vacation travelling for the next 6 weeks, which will take me to Chicago, Denver and Corpus. Figured I may as well take in some baseball while I'm out there. It might partially make up for the fact that this will be the first year I have not been to a single Astros game, since 1995

So I'm looking for recommendations on:
1. Where to sit at Wrigley for the Reds game next Saturday (16th) so that I'm not facing the sun for a 5pm start
2. A smart way to navigate between Wrigley and O'Hare (I'll be sans car)
3. Where to sit at Coors Field for the Giants game there on Monday the 18th (6:35pm start), as well as a place to take in dinner before/after. I'll have a car in Denver... what's the parking like around there?
Also, how smart is it to wait and get walk-up tickets at either place? Would I be better off ordering online and going willcall?
Anyone know whether the AA playoffs will (still) be ongoing by September 24th? I'd LOVE to take in a Hooks game, if possible, since I'm going to be in Corpus for a month.
Thanks all.