They should be fine...I would practice wearing them around town first so you both can get use to it
I rode everything w/dd in Fantasyland and adventureland, haunted mansion was great she slept thru it! The only rides at mk we didn't ride was SM,BTM,SM...and those I did rider swap. Just go to the line where the cast member stands tell them you need to rider swap trhey will give you a ticket. the rest of the family rides then when they come off someone will stay w/ the baby and then you all get to ride again thru fastpass line!
Epcot..rode everything but TT,Soarin, just did rider swAP FOR THOSE. she rode Malstrom and the mexico too.
DHS everything except..TOT, RR, Star tours
Ak..yes she rode the safari..everything except dinosaur,EE, Kali river rapids