Season 6 is getting a "favorites" set.

http://tvshowsondvd.com/news/Mamas-Family-Mamas-Favorites-Season-6/21249

Here's the 6 episodes that will be included in this set:
"Mama Fights Back," "Bubba's House Band," "The Big Nap," "Pinup Mama," "Look Who's Breathing" and "Bye-Bye - Baby!"

For this set, I would've picked these 6 episodes....they 're my favorites from the season:

Mama's Medicine Show
Psychic Pheno-Mama
Bubba's House Band
Mama Gets Goosed
Look Who's Breathing
Bye-Bye - Baby!