As mentioned above, use the recruitment threads and the search function to find UK specific information. Do not be fooled into thinking UK rush is easier than others in the SEC. It is not. My daughter went through the process in the fall and had a good outcome. Like you, she rushed as an out of state girl and did fine. You need recs, you need to get them in ASAP, you need a 3.0 and you need to have a shiny open mind. Every house on that campus is tremendous and you will be wise to not listen to idle chit chat about tiers.
P.S. Know what is top tier at UK? The basketball team. C-A-T-S Cats! Cats! Cats!
I would never recommend going thru rush at UK without recs. Try to have a least 1, so you don't have to worry about that component of the process. Better safe than sorry. I know many young ladies at UK that are in sororities, and they are all having a great experience.
Right now all anyone can focus on is the final four. C-A-T-S Cats Cats Cats!!!