Hi Noah!
If there is to be a page for each location then there should be something useful to say about each location too.
Consider what would actually be useful to users specifically searching for the page about their area.
As well as the content about the activities you offer (which, as previous answerers have said, should be unique for each page and show you to be the 'fishing guy') I would suggest:
- Information about how to get to each location
- Local places to stay if people are to travel for the fishing activities
- Anything that makes that particular city unique/interesting in terms of the experience you offer
That type of information that is specific about each location will be unique to each landing page.
As previous answerers have also suggested, customer testimonials and other forms of user generated content would be great.