My husband, 11-year-old and I are planning a trip from OH to Vegas next month. In trying to decide which route to take (either I70 through Colorado or the southern I40 route)we are wondering if I40 is scenic (since we know Rockies are) and in reading some about traveling especially through some of the I70 tunnels around Glenwood, I'm hesitant to go that route. We want to have fun, but trying to settle nerves before the trip about altitude, etc (ie: one place on I70 we would be 11,000 ft! This apparently ascends pretty quickly...and IM wondering about mountain sickness symptoms. Or is that only if you are hiking on mountains such as these?) As you can tell, we haven't gotten out much. Any advise/info would sure help us in planning! Thanks!