Hahaha! This is THE TRUTH.
One sleeping bag will suffice, provided that it's a -30 degree winter camping monster (and those are expensive). Otherwise use two lighter weight ones.
You can't go wrong by hooking up with a lonely resort chick, but I think the term "lonely resort chick" is a bit of an oxymoron. There really aren't any due to the laws of supply and demand. Most resorts have plenty of demand but the supply can be hard to come by. Tourist chicks looking for a good time might provide a happier hunting ground.
Finally, it comes down to your choice of cars. I used to have a VW camper van w/ auxillary heat. It was sweet and I could fire up the stove and cook breakfast every morning. The key here was auxillary heat because those vans are damn cold. I friend of mine lived in the A Basin parking lot for 3 winters in his van - a Dodge or something. Once again, auxillary heat (propane).
If you don't have a van, then hopefully you have a station wagon or something so you can lie down, that's key. Sleeping in a car with only seats that go flat sucks. It's all about being able to stretch out and relax.
Save the $60. That's lift ticket cash!