All Stars with small kids, IMHO, is your call. I would use the crib. I think it also depends on how many nights you will be staying. We are a family of 5 and will be staying at ASMu for 5 nights and then 3 nights at the Poly.
But don't forget that CSR is also a choice for 5. I called the hotel directly and when I asked if there rooms sleep 5, I was told no. When I asked if we could sleep 5 if used the roll-away, I was told yes. This was the same person. The roll away costs and additional $15 per night.
The moderates don't offer that much more room, some, but not much.
I hope I've helped in some way,
Lori
6/1997 Off site, 2/2000 Off site, 2/2001 Poly, 10/2001 POFQ, AKL & Magic, 1/2002 ASMo & AKL, 12/2002 ASMu & Poly