I've just graduated from a 2 year program in college. I chose not to live on residence because it was not my type of scene, plus the money was not there. I lived both at home and other family's places, trying to cut costs on commuting in any way I could. So I was not submerged in the college life, living on campus and going to every pub night. But either way you spell it out, temptation is all the same; it all comes from the same evil mastermind (Satan), with no intentions to help or benefit your life. And like all temptation, God is your only exit from the situation.
I think an appropriate verse for this topic is James 4:7, "Submit yourselves therefore to God. Resist the devil, and he will flee from you."
As far as being prepared for the college lifestyle, who says you need to adjust? By this time we've already been through years of school and the typical pressures that come with it. College should be no different. It all comes down to each individual's foundation in Christ. When God's word becomes your default answer to temptation, the devil will have a hard time getting to you. Sure, pressures may feel more intense because everyone is the legal drinking age and have more freedom. But if you've been fighting temptation until the time you enter college, it's going to be textbook plays for resisting sin in the same way you always have.
II Timothy 2:22 reads, "But run away from the evil desires of youth. Try hard to live right and to have faith, love, and peace, together with those who trust in the Lord from pure hearts." I encourage you to continue reading through verse 26.
Hope someone finds this helpful.