Bridesmaids that aren’t actually in the wedding

I would like to have a few friends join me for a bachelorette party and join me in the pre wedding shenanigans of getting ready together, and having some photos with them etc before the wedding but I’m not sure how to ask them to do this since it’s not actually a “bridesmaid”. I like the idea of the cute “will you be my bridesmaid” gifts/ card for them but I have no idea how to word this. I don’t want them to assume they’ll actually be in the wedding by calling them bridesmaid