I have a feeling there are music files in my folders that are not linked to iTunes but can't figure out how to import them without going through all 8800+ files. Is there an easy way to import all the files without losing the current playcounts
AFIK there isn't an easy way of linking up to a lot of dead tracks and retaining play counts etc, except by finding the dead tracks and repairing each link individually. The only exception to this is if there is a simple error in the path that can be fixed by a search and replace on the xml library file, then rebuilding the library. However it doesn't sound as though that would be a solution for you.
This MacMuse tip has a way of finding dead tracks if that helps.
http://discussions.apple.com/thread.jspa?threadID=121967
It is much simpler to sacrifice the playcount information and just reimport your iTunes Music folder. Then you can eliminate the dead tracks with a script. One of the forum members has written one that you can find here:
http://home.comcast.net/~teridon73/itunesscripts/