This is probably something that will have different opinions, and there are a lot of variables (like when your players are from…not all A/A’s are created equally, what your pitching staff looks like, what your offense looks like), but my immediate response is hitters park. Your defense will prevent runs scored with fewer errors and more hits taken away through range, and your hitters will benefit from the park to give you runs scored.
I build a lot of A+ range teams, and I always put them in Baker Bowl or Hilltop to get the most out of my fielders and hitters.