Donating

Hi!

I am just wondering if anyone can help me with some questions about donating. I have a 3 month old. I work 3 days a week (1 full and 2 half) so he gets 1 bottle on the half days and 2 on the full days. Generally they are 4-5 oz. I have a pretty solid freezer stash. Probably around 1,000 oz. I pump anywhere from 12-18 ounces of milk a day on top of feeding my kiddo. I was hoping to donate to a mom but I am wondering if I can donate and keep up my own supply and stash? Thoughts?