Hi! This is my first time to post. We are planning a trip out west (2 adults,2 girls-ages 9 and 14), leaving the first of July and returning the 15th. On the way out there, we plan to spend a couple of days in the Grand canyon. From there we will go to Las Vegas, San Diego (the zoo), LA, San Francisco. We will come back by way of Salt lake city, denver, Kansas City, St. Louis, and home to middle TN. Any suggestions, tips would be greatly appreciated. We are trying to go low to middle budget. I am not quite sure how to plan as far as gas and hotels go. HELP!!!!!!!