Hello All!

I'm planning a road trip with 6 friends from chicago to aspen, co. We are leaving March 28th, and need to be home Sunday, April 4th. Here's the deal. One of my friends uncles has a time share in Aspen from march 28th-april 3rd. He offered us the place for FREE, all we had to do was get there. We are all fresh out of college and couldnt afford to pass. We are also all fresh out of college and cant afford to spend too much money. We are driving a Ford Expedition ( 15mpg ), so I know going up the mountains will be strenuous. Also, since my friend gets in from NY at 10am, we are not leaving until about 11am the 28th of March. We want to maximize the time in aspen, and with the multiple drivers we are going to make the trip in one shot. Approx 24 hrs Im guessing. I would like to know what would be the quickest route there, and also the least dangerous. If anyone could give tips on both or anythign else I should know about I'd appreciate any and all advice. I searched a travel calculator and It approx. 19 hrs to get there, I added just in case, and about $345 round-trip in gas, which was half the price of 1 plane ticket. FYI, I've driven to miami from chicago in 24 hrs straight, so I dont mind the terrible hours, just lookin for advice THanks!