I thought it was worth a mention. It's been quite a while since we had a TV Alert pop up on parks, but Foxtel is at it again...
TLC channel 646 and TLC +2 on channel 647 have been showing a lot of theme park related stuff lately...
Today there was 'americas best water parks' and screening right now is 'americas best rollercoasters' on TLC+2.
By far the best i've seen so far are the series 'Disney Parks' which show an (authorised) backstage look at the parks. Disney Parks has been showing for a few weeks, and i've recorded them all, so will try and post them when I get the chance (if they aren't online elsewhere already)... also recorded the waterpark episode (which featured WnW Orlando) and currently recording the rollercoaster episode.
If you have Foxtel, have a look at the guide over the next couple of days and you'll find quite a few of these in the schedule.