How busy does everyone think the world will be the 1st week of April? We have been planning on a trip to the Grand Canyon (from St.Louis), driving and with the price of gas - am now wondering if the world is a good alternative. What about the crowds? We have been there during Christmas in 2009, that was the busiest we have ever experienced and did not really enjoy it as well...........not sure how many will be on spring break that week. We would leave on Easter...TIA