Kuzano wrote:
Make sure to check every entrance for possible closure for any sort of repairs.
Last time I visited Yellowstone, I lost 2/3 of a day backtracking from the Cody entrance and going around to the North Entrance.
Get a highway/entrance traffic report for all access points to Yellowstone.
This web site will help, but read it thoroughly and check it often.
http://www.nps.gov/yell/planyourvisit/roadclosures.htm
Thanks, that is very helpful as we will be there by May 8.