Irene and I were at Medicine Bow two weeks ago and we agree that Sugarloaf campground is ideal for it's views of the mountain range and lakes. Yes, it is high altitude camping (10,800 feet) so your nights are going to get cold on you. Arrive with a full propane tank to run your furnace at night without concern. We filled our propane and main fuel tank in Laramie at a Conoco gas station called West Laramie Fly Store off the main highway I-80 on Route 130, and entered Medicine Bow from the east taking Snowy Range Road (Route 130) through Centennial. Centennial sells gas but the old 2-pump station was not impressive.
Be mindful that there is no water at any of the campgrounds except at Silver Lake on the west end, and it's a hand pump that provides tan colored water. The visitor center rangers said it is safe to drink, but we consumed our own purchased water.
If you are decent hikers, we recommend hiking to the top of Medicine Bow peak, trail head at the end of the gravel road from Sugarloaf campground. The sign at the trail head says it is 5 miles to the summit but it is wrong. It is 2 miles up and 2 miles back. There is a junction on the trail beyond the half way point. It is very clearly marked which way to go from there. The hike along the way (especially after the junction) offers extremely beautiful views of many of the lakes and mountain range.