Land of the Lost was awesome! The acting was bad but the writing and fx were great--they'd actually get sf writers for the writing.
BTW, here's the LotL fan site, where DVDs of the original episodes are now available:
I've heard a remake of LotL is in the works, but don't know the current status--there's probably news on the site.
I also liked the other Krofft shows, esp. Sigmund the Sea Monster and Electra Woman and Dynagirl.