Definitely pack layers - shorts, jeans, short and long-sleeved shirts, sweatshirt, jacket, light gloves. That way you're ready for anything!
In February, it's usually chilly in the mornings, and sometimes downright hot by the afternoon. I usually start out in shorts or jeans (based on forecast), short-sleeved shirt, sweatshirt and/or jacket, and peel off the layers as the day goes on.
Lynn K is handing priority seating arrangements for a mini-meet at 12:15 p.m. at the 50's Prime Time Diner in MGM on February 10th. If you'll be there in time, please join us! See Lynn's post (also on the Solo boards), and send her a PM so she can add you to the PS.
Have a safe trip!
Jo