I'm so sorry to hear about your mother! I think the best thing to say at her funeral is the truth, so be honest about the good and the bad. Alcoholism is a disease, maybe you can honor your mother's struggle by asking the family to send donations to AA instead of flowers? I have 2 good friends who are sober today because of AA and they are wonderful people! It sounds like you love your mother very much, and want to honor her and the truth, and I feel that you can do that. Honor her struggle with her disease, but don't ignore it.
Blessings,
Dove
Blessings,
Dove