I am a dk. strawberry blonde, blue-green eyes, with a porcelain complexion. I do not look good with a tan. I do not tan naturally. I look better with my natural peaches and cream complexion. I'd never get a spray tan.
I'm very torn on if I want to tan beforehand. If I do, it will be in a tanning bed despite the dangers. I do not want to spray as almost every spray I've ever seen is orangey. "I don't look orange." Yes, you do. I have 2 more days to make up my mind.
If I might make a recommendation from painful personal experience...spray tans tend to rub off on clothes, ESPECIALLY expensive and white ones. It might depend on the brand though. Do a trial run or two first, and don't forget to find a darker foundation color if necessary.
Have you ever done a spray tan before? If not, I most certainly would not recommend doing one for the first time for your wedding.
If you spray tan, you need to exfoliate very thoroughly ahead of time, otherwise the drier/dead patches of skin can absorb more color and you'll look blotchy. Definitely not something to experiment with right before your wedding.
Personally, I don't see the obsession with being tan. I'm fair/light skinned with blond hair and gray eyes and wish more people would embrace the beautiful skin they were born with. I know it can be SO HARD when all the photos we see are of bronzed, slender models, but I honestly think fair skin can be beautiful (super dark skin too). Your partner loves you for who you are. I always feel a bride should always look like the best version of their authentic self on their wedding day. If being tan is new to you or you've never spray tanned before, I'd skip it and go as your fair skinned, natural self instead.
Also the chances of your spray tan staining your wedding dress, as the previous poster mentioned, is pretty high. If you have any thoughts of preserving or reselling your dress after the wedding, any spray tan stains might ruin those plans. If you are sweating a lot, it could also rub off on your partner's shirt or other people. Just another thing to consider as well.