comment merging

well here’s the deal. i have a list of pages under a category. they are for state parks. eventually i will write an article about each park in the list. i have it so that it includes the article in the page if i have written it. but if someone comments on that article, i would like to be able to merge the comments from that article with the comments on the page for the park that the article is about. if it exists of course. any ideas here?