sorry for the double post but i also remembered there is this web site (you will have to look around im studying for finals) but its like a car pool website to the mtns to cut down on traffic on 70.
also when im by myself and no one is going up i go to a park and ride off I-70 and just put up the thumb and since i have both passes out here i can go anywhere. but im sure you could find someone driving to your mtn.
Now i noticed you said something about a family of 4? that would be more difficult but if you split up into 2 groups of 2 you should be fine.
there are not as many creepers in CO than you would think. ive hitch hiked for 2 years now never even met a sketch person. and if they are dont go with them. common scens iom