I never did go to church on Sunday after a contest! I was likely to sleep until 11am or noon to make up for no sleep on Friday night and the stress and work!
Around KC, it seems there are enough contests in the area within a two hour drive that most people just take off Friday. I haven't heard of much Thursday travel except for the folks coming long distances.
As for sticking around until Sunday, outside of the Royal, I don't see it being done much. Most folks I know like to start packing up the minute the final turn-in goes to the judging area so that once the awards are over, they can get the hell outta there and head home for a good non-BBQ meal, a hot shower and a comfortable bed!
KCBS Member #14287