Re: landlocks vs brookies
Education and experience (not bureaucracy) precipitate this response.
When an indigenous specie has its range augmented by a non indigenous specie adverse affects usually result for the original species.
This is not to suggest that the brook trout will become non existent in your spot but comparable introductions of brown trout in brook trout habitat in Pennsylvania has shown that the larger and more aggressive brown trout tend to occupy most of the channel and the brook trout are relegated to the uppermost areas of the watersheds.
In the west the opposite has been found with the eastern brook trout gaining the upper-hand when competing with species such as green back, cut, and indigenous rainbow trout to name a few.
*Disclaimer; I do not make any claims to be an expert regarding this issue and am offering this response based on both theory and practice to which I have had access.