I saw an advertisement with Liz Massey of TodaysTHV (channel 11) about Geocaching at Petit Jean on this Friday's newscast. It didn't list a specific time for the report. They have newscasts at 5, 6 & 10, so it could be on any one of them. I got my Tivo set up to record all 3 just in case!
In case you miss it, THV is really good about posting their videos on their website.