There is a difference between "hitter's parks" and HR parks. Example: Dodger stadium kills offense and results in fewer runs, but it is pretty neutral in terms of HR.
If you want to know hitter's parks vice HR parks, look at a stat called park factor, which shows how much each park effects run production. For evaluating the effect on pitchers, park factor is by far the better measure than looking just at HRs.
These can be found at a number of websites, but I like baseballreference.com, since they have historical data and you can look at a three year trend rather than a single datapoint.
Whichever metric you are after, you are wise to look at the hard data, since many people have strong misconceptions about this type of thing. For instance, Camden somehow has a reputation as a hitter's paradise when it is actually a bit of a pitcher's park.