I was born in 1966, so Land of the Lost was a staple of mine too. I know the special effects were not always up to snuff, but I think the writing and plots made up for it. The third season with "Uncle Jack" wasn't the greatest but I liked the shows where they played with the pylons, encountered a Confederate soldier and of course, who can forget the Sleestak. The Sleestak still put some fear into me to this very day although I do admit they can't hit the broadside of a barn with the crossbows. The Library of Skulls in The Lost City were kind of eerie too.
The real freakiest thing about the Sleestaks was when the gray intelligent one (who just happen to speak perfect English) appeared and he had thought he went back in time and was studying the early ancestors of his race, but instead he finds out he actually went forward in time and was seeing the future fate of his race.
Pretty intense for a children's show.