I am going to give lots of options, I am one of those horrid people who always notices what people are wearing so...please take this with the humor it is intended. You are going to look fine whatever you wear, be yourself and have a good time.
That said, in my opinion, if I was dressing myself for a wedding:
If the wedding is in a Chapel of a Church wear a dress, if it's an evening service with lots of bridesmaids and tuxedos, long train, etc...wear a dress. The more formal the wedding the more you will stand out if you dress differently than the others attending. If you are sitting up front and the crowd is large wear something suitable. A very nice, dressy, pants suit would be acceptable to me if it was worn with heels, make up nicely done, nails painted/manicured, and nice jewelry to make it look like you made an effort.
If the service is less formal then you can get away with more causal attire. I have a very dear friend who hates her ankles, she is in her 50's and feels self concious every time she shows them when wearing a dress. She takes pains to avoid it. She wears lots of dresses for Church and other activities so here's some things she does. She wears boots in winter, tall leather like boots. They even have boots at Wal-Mart right now and Penneys too. If you just don't have boots or don't want to wear them then think about the longer skirt option. You can wear a longer skirt, knee highs, and some nice shoes and then your legs won't stand out. I wear dresses and panty hose all the time, I am comfortable in them. But then again, I wore dresses and suits with heels and panty hose to college, every day...lol.