A movie about a family that leaves the rat race to go and live in sort of wilderness where there is only one shop, there is a family that live in a nuclear bunker who buy everything from shop and leave everyone else with nothing, then some big rains come and everyone's house start floating away and they all want to live with family who have just moved there including family living in nuclear bunker.
Funny film I though Chevy chase starred bu cannot ind it in his catalogue.
Please help

Sounds like Packin' It In (http://www.imdb.com/title/tt0086071/)

Thank you for answer, unfortunately I can't get enough info about that movie to see if its correct

You can see a short clip here: YouTube (http://www.youtube.com/watch?v=UetuU4UFU-0)