As a 59 y/o who has been to WDW twice in past 5 years and going on my first solo trip this November, I know your Moms will have a great time with their Disser daughters! I have found that if I take it nice and slow with time to smell the flowers, go on a tour or two, plan a nice dinner at a signature resort, the whole trip proves magical. Plan on time to people watch and have somewhere they can sit if they have to be in line for a long time - I have a little fold up stool - they will have a much better time. Have fun!