I'm a fairly competent and experienced DM so I feel confident I can do some homebrew or retheming when needed. So I ask for those who may know this module a little better than my cursory reading would provide knowledge of: What supplements or additional content fit within this adventure well? My players are always the ones that seek out a quest board every town they visit. They look for the big monsters to hunt. And I would like to provide plenty of opportunities to give them a chance to do these things so long as it makes thematic sense. I have Helianas Guide to Monster Hunting I was gonna use for some big bad monsters every level and retheming the locale to wherever they were located. But what other options are a good fit for this? I welcome any and all suggestions.

Bounties. Give each monster that you want a wanted poster, and a reward based on how dangerous it is to the local civilians, for incentive. I find this works really well for motivating players.

Thats more or less what the Helianas Guide to Monster Hunting will be. Basically a bounty for a monster based on the level they currently are at.