So much fun Jen!
50mm, 85mm, 28-135mm, 70-200mm, 24-70mm
If those were in my bag I think I would choose
50mm for night time and portraity shots
70-200mm for walking around and ride shots
that being said I continually bonk my child in the head with my longer lenses when we are out walking somewhere so for practical (and brain development) purposes the 28-135 might be a better choice
When I was at WDW with DD Team in January I used my 50mm quite a bit and my 17-40mm and found myself wishing I'd brought my larger lens (that could have just been lens envy though standing so close to Mel's piece of equipment
)