(Zion National Park, UT)  –  If your long weekend plans include a trip to Zion National Park, get ready for long lines and big crowds.  The park said yesterday that they would like people to visit any day but Saturday if possible.  That was their busiest day of Memorial Day weekend last year when 28-thousand of the 70-thousand people who visited over the long weekend did so.  The park will increase staffing and extend hours for many facilities as a result of the expected crowds. Â