Because everything is closing here. Not sure what will still be open when we'd go....where would we buy fuel to boil our water for our food? You know, all the unknowns. Situation seems to get worse by the day with the #'s doubling and rules the government is putting into affect. Plane to get there and bus rides at the grand canyon "if bus is still operating" would make me a nervous wreck. Decided it would be more enjoyable to wait until spring break next year. We will see what happens!!! God luck on your trip.