1. Everyone above pretty much nailed it. I can usually spoon and fall asleep comfortably, but often I roll over and let our backs touch. It's still nice contact, but let's you move around a bit more for comfort.
2. I don't buy the whole "taking advantage" line. First, you were BOTH intoxicated/high. So it's a bit of a moot point. However, even if only one of you was drunk, that person still CHOSE to drink, knowing the outcome is a lack of sensibilities to one degree or another. If you drink and have sex, it's still a choice. *shrug*
3. I never enjoy myself terribly with condoms. However, I also tend to have longer relationships. I've had sex a VERY few times with girls I either didn't know well or had no intention of sticking around. In this case you just have to pray for a little satisfaction.
4. If she doesn't want anything said, then yes, stay quiet about it. I think that's surely the honorable thing to do. Looking at girls as trophies is a sure way to be an asshat. If it happens again, maybe she won't mind as much?