If you really want to go with the operational look....

Take a large ALICE pack, with a cut down Peak1 (or molle, but it's not as flexible) frame and the frame's straps.

Think about it: Space for three bottles in the small pouches. Bib goes in the map pocket in the flap. One outside pocket gets Mr Bunny. One outside pocket gets the baby wipes. Third outside pocket gets the hat, the spare socks, etc. Inside, under the radio pouch, you have space for two waterproof pouches- one for used (double bag that one, one for unused. Plenty of room of a small box of baby meds. Roll up the blanket, strap that to frame under the pack. Roll up the changing pad, strap it to the bottom of the pack (so it is seperate from the blanket). Attach a CountyComm EOD bag or similiar to the flap straps at the top, for a couple changes of clothes and a basic FAK. Clip a water bottle pouch to the bottom of that, with a nalgene, to refill the little bottles. Clip a pouch to the offside shoulder for two pacifiers, a rattle, a second bib, and a spit up rag. Slip a second spit up rag under between the flap and the EOD pouch. If possible, add a hexamine stove and a nalgene cup with a spacer, so you can warm bottles.

Worst case scenario, a baby probably fits in the radio pocket, but make sure you replace the horrid metal thingy with a fastex buckle or you'll never get the kid out of there. <img src="/images/graemlins/grin.gif" alt="" />

And if you wife is annoyed, or your kid ends up more equipped that you are in ten years, don't blame me.