The parks don't close at "dinnertime". I think MK was open until 9, EPCOT until 9, MGM until 7 maybe and AK until dusk as always. Weekend hours were a little longer than weekday hours.
But as My5Mouseketeers said, the crowds are so light that you can get so much done in a day. That leaves the evenings free for hotel-hopping, DTD, Old Town, Belz shopping, etc.
We'll be there again this week for our 3rd annual Jersey Week trip. I'll wear my DIS shirt and lime green Mickey heads so say hi if you see us.