Here are a series of great looking backgrounds from the first episode of The Huckleberry Hound Show which first aired in 1958. The series was a launchpad for such classic Hanna-Barbera stars such as Yogi Bear, Pixie & Dixie with Mr.Jinks and of course Huckleberry Hound.The background artists are listed as Montealegre and Sam Clayberger with titles by Lawrence Goble.
You can find this episode plus many others on the DVD release of The Huckleberry Show Volume 1!