i don’t want my mom in the bridal suite

I’m kind of just venting here because I just don’t know what to do. I have been very independent my whole life. I have two older siblings who my mom seems to help financially all the time. She paid for both my sister and brothers weddings but when I asked her 2 weeks ago if she was able to help at all or if there was something maybe she would like to pay for she said she could maybe give me $1000 but maybe not. I was nice and just said that’s fine if you can’t no big deal. My parents are divorced now and both remarried and she is so concerned with how much my dad is going to give me. Which he is giving me $5000 and he told me to tell my mom that. Well fast forward to last week I called to reminder to her book a hotel if she needs one because they are filling up. She asked about my dress and I told her I already ordered one she was upset and said the mother of the bride is suppose to be there and help. I made excuses that I had to get it ordered ASAP because the wedding is in 5 months! Which is 100% true but also I didn’t want her there. She has called me fat so many times in my life we don’t agree on any style of clothing and I already don’t feel pretty in a dress so I just couldn’t handle the negativity. She now is talking about when i hiring a hair and make up person she would like them to do her as well....well the thing is I don’t want her in the bridal suite with me. She is a HEAVY smoker and of course she won’t smoke in the suite but she smells so bad of smoke after I don’t want the whole bridal suite to smell like smoke. I can’t used the excuse the suite isn’t big enough because it’s huge! I just will not be able to relax with her up there and she will complain about every little thing. I don’t even want pictures of her zipping up my dress. We don’t have that kind of relationship and it would make me very uncomfortable. I would ask if anyone has a nice way to tell her I don’t want her in the bridal suite but I know that’s not possible. Do I just give in and have to deal with it? This is stressing me so much