I still have a month to go before DS is here, but we've got a pretty good/mixed stash of CD's all ready to go. We have AIO's, hybrids, and pockets, but I've been thinking about getting a couple fitteds for overnight.

So my questions are:
1. Any fitted recommendations? (I prefer one-size, if possible, but it's not the end of the world if it isnt)
2. How many would I need for JUST overnight use?
3. Would my grovia hybrid shells work as a cover, or would I have to use a specific diaper cover?
4. Cover recommendations? We have ONE thirsties.

Thanks so much!

ETA: I would prefer something with snaps as a closure (or aplix). I just don't want to deal with snappi's or whatever.