Surprise wedding for my wife

My wife and I met while in college. She ended up dropping out to get a trade instead. I stayed. We ended up doing the long distant for a while. After university I went to med school. She was really patient. It took up a lot of my time. When I was an intern an a hospital I was on call all the time and she continued to stay by my side. We were engaged and she had always talked about her perfect wedding and even planned it out, but with constantly being on call as an intern it didn't made it hard to have a wedding, so we ended up getting married by one of my coworkers who was an officiate. We got married at the hospital and two nurses were our witnesses. It wasn't the wedding she wanted but she never complained. In August we are gonna be celebrating 7 years married I've been planning a wedding with my sister in laws help since last September. I got a venue she originally wanted. I'm getting the flowers she originally wanted and her sister has pretty much been under covering figuring out everything she wants for her dream wedding. The plan is to surprise her on our anniversary with the wedding. How we are planning to do that, we are still trying to work that out. We haven't quite figured it out yet. I was wondering if anyone had any ideas. I know we will figure out all the kinks by August but I was hoping any of you women had ideas or advice for me to make this wedding perfect.❤