K.P.
I grew up there and can tell you that literally... less is more. When we are all home and go out (especially at my age/build), I tend to go with a great pair of jean, heels and a fancy tank- great jewelry is a must too!
At this time of year, you will see people in a variety of outfits, but you should wear what you find comfortalbe, attractive and appropriate! Have a great time and enjoy!