Correct me if I'm wrong, but there's no need to highlight the parks in question, is there? I came on the forum to make the point that, apart from removing one word in each clue so that the clue makes sense, the 3 letters picked out from each removed word are really surplus to any requirements for completion of the puzzle. Indeed, the weeding out of the names of the 3 National Parks involved from those letters is tedious in the extreme, and if you have the theme already, which 99.9% of solvers will have, what's the point?