Just a thot' if your nephew is keen on the Princesses he will be able to meet at least one face to face at the Princess Pavillion. Other posters will be able to give you more accurate info but Im sure there is a separate shorter line for those with a disability pass. There is also the show on Castle stage the Starlit Waltz which is a great show and dance with lots of Princes and Princesses. Might give you the interactions and viewings you want without going for a character meal. You can then choose somewhere based on the food choices. Have a fab trip.
1992 Honeymoon DH
1994 Oct DH, 1996 Jan DH, 1998 Oct DH, 2000 Oct DCR, 2002 Jan SL....too many babies so a big break...2010 Mar SF, 2011 Mar SF, 2013 Jan Kyriad, 2013 Apr Gite, 2013 Oct Gite + 2nts DC, 2014 New Year/Jan SF, 2015 New Year/Jan SF, 2015 Oct Gite, 2016 Jan Gite, 2016 Easter Kyriad, 2016 June Explorers, 2016/7 NY Dream Castle and Gite, 2017 Feb Cheyenne , 2017 May Dream Castle, 2017/8 NY/Jan Gite, 2018 Feb Dream Castle Hotel, 2018 Nov Dream Castle, 2019 Feb Santa Fe.