Hi there-
I have a 3 month old. I have been pumping in the evening and it works great. My son is on a pretty consistent sleep shedule of going to bed at 7 pm and not waking for 8-10 hours. I find that if I pump at 10 pm before I sleep I can have a bottle for him and it saves me from getting to full in the evenings...
If your little one doesn't sleep so regularly I have been told by other Moms that the thing to do is to pump every day at the same time- like if your child always naps at a certain time, maybe do it at the beginning so you have to resupply while he sleeps. After a few days your body will start to produce more mild for the "pump feed". Your baby might nurse a little more those first couple of days to make up for it, but all the better, that just increases your flow.
Once you get a stockpile of bottles, just quit pumping. When you are ready to restock, your production may have gone down and it might take a few pumps to fill up just one bottle.
Hope this helps! It seem so me that are bodies are pretty amazing at producing the right amount of milk quickly. I think the key is just to find a time to pump that works best for you and everything else will fall into place.