Hi kismet23... glad to hear you and your baby will be re-united with your husband and your little family will be complete finally. Based on my experience with my first trip to Canada year 2008, you don't need to be very particular with the items you will declare when you board lalo na kung clothes mostly lang, besides the form will be given to you pag nasa loob ka na. My only advice is for you and your baby to wear a comfortable clothes and shoes, remember its almost around 12 to 14 hours flight (if you are taking a direct flight), and will be somewhat a long walk around Vancouver airport, just don't forget on your hand carry a jacket w/ hood or coat, para prepare kayo sa lamig pag labas nyo.
BTW, I also have a baby (2 year old chubby little girl) that I am still waiting for her Citizenship Certificate, still on process mayl arrived on April or May of this year. I just want to ask if you were able to get a passport to your baby? or is she below 2 years old?
Goodluck...