Thanks everyone for your helpful advice! I really appreciate it! I think at this point we're going to try to get DS to start the night in his bed -- we've been doing naps there for a week now and he's getting used to it pretty quickly. Even if he wakes and crawls in bed with us in the middle of the night, I think I'd rather that set-up, than risk him waking every time the babies do. Then we can have both babies in the co-sleeper next to me, and DS can join us in between DH and I if he needs to. That way, we may not have to get a king size bed right away, although I'm sure eventually we'll really want one. We've wanted one with just DS! :LOL I wish our room were big enough to do a king and twin, that would be SO nice!
But, I do like the idea of having the babies sleep next to each other, so I don't have to turn my back to one -- that's not something I had thought of.
We're having fun looking for stuff at yard sales, especially girl clothes.
We found another swing, and as much as I don't want to need it, we decided to get it anyway, since I'm sure it'll get used. I don't want to get to a point where I wish we had bought it, but didn't. I just don't know where we're going to put all this stuff! :LOL We'll make do, I'm sure. I'm looking forward to a sleep-deprived, but happy ride!