From either direction on I-70, take exit 180 about 4 miles east of the main town exit for Vail. As you exit, go south and onto Big Horn Road. Drive east on that road 2.3 miles through condo and residential village to the trailhead. Big Horn Road will turn NE and cross under the interstate, then make a broad curve to the east and SE. Parking for the trailhead is on that curve. Just a short distance past the trailhead is the entrance to the Gore Creek Campground. There may be some more shoulder parking on the road just beyond the CG. A little more past there, the road is barred from vehicular traffic and becomes the bike trail over Vail Pass. On weekends, the available parking fills beyond capacity. Arrive early if you want to park close to the trailhead.
Just east of the trailhead parking is the Gore Creek Campground, a National Forest Service fee area with vault toilets and water. Reservations may be made for campsites at reserveamerica.com
. Other than that, there is virtually no other place close by with at-large/primitive camping. Your best bet may be to go up to the summit of Vail Pass and drive down the Black Lakes Road where there is a pullout parking area right where the road is barred from vehicular traffic and becomes the Vail Pass bike trail, east end. This is not a primitive camp location but you may be able to sleep in your vehicle.