You are not nuts...but you MUST plan, plan, plan. and be willing to get up early!
Last year was the first year we "spilled" into the dreaded "PEAK WEEK," after December 25th. I was very worried! However, we went to MK on December 26, arrived at 7AM for EE, and HAD THE PLACE TO OURSELVES until 9:00--from 9 until 10 the crowds were fairly light. We bailed shortly thereaftre, but HEY!, we had done ride after ride with no lines for three hours!
In fact, I was so pleased with our experience that we are going this year from Dec. 26-Jan 3. I now know that it can work! (we had done Jan 1-2-3 befoare, so I know that is okay, but I was worried about the rest!)