I read your SWH also here's some advice from a fellow working mom :)
I breastfed the baby the very last thing before I left him at the daycare. Then I would pump every 3 hours, and nurse as soon as we were together again. And of course keep nursing all evening and the weekends were no bottles at all.
For bottles, I made 3 oz bottles each morning (figuring the baby would be fed around 10, 12:30, and 3, every 2.5 hours after I left since I had just nursed). I would split the breastmilk evenly between the 3 bottles, and then top them off with formula until it was at the 3 oz line. The daycare had extra powder for formula, so that if they needed one more bottle for some reason, they could make it.
The down side of this method is that if there is anyleftover in the bottles at the end of the day, you can't keep it. This is because the breastmilk and formula are mixed, and while breastmilk will keep for up to 7 days, formula needs to be made fresh daily. If you had a bottle that was 100% breastmilk and it wasn't finished, you could keep what was left for the next day and give it again. But, my babies didn't like the taste of pure formula very much and so they were more willing to take the bottle when it was mixed with breastmilk.
Also, I wouldn't worry too much about not pumping much now. You are pumping on top of breastfeeding right now, yes? Then it makes sense that you aren't pumping much, because she's eating most of what you have all day. It may be much different when you are away from the baby.
Good luck!