Nobody should have to think twice about whether they want to go to Spring Fever or to a Worlds. To me it is a no-brainer.
I can think of two reasons.
Not enough money to attend an event on the other side of the map. (travel, hotel)
not enough time to attend the event. If you have to drive you'll need to plan for more days off, etc.
For us, Spring Fever is closer. You can camp, but we stay with people.
Believe me, I would love to participate in a World event. But there are circumstances that will hinder people from going. Are we going to sit at home that weekend because we can't go to the Worlds? No, we'll go to Spring Fever.
Tracie