This is what I'm doing lol - I'm not sure what I'm getting on my flannel, but my bridesmaids can bring a flannel shirt they already own. We're also going to be wearing leggings but we'll wear what we already own.
I have a bride pyjama set that I'll wear the night before and then for hair and makeup I'll be wearing a silk bride robe. i wasn't planning on going the robe route, but I found one on clearance at La Senza.
I have a flannel shirt I got off Etsy. It says "Wifey est 2019" on the back. That will be my getting ready. I am thinking of asking the girls to just wear a flannel shirt so we can kinda match, or leave it open to them!