New to the Board and have a trip in early May for a week at WDW. Going with granddaughter who is 6 and it will be difficult not to be a full time photographer. I have two Nikon cameras, one a full frame D610 and a crop sensored D500. I am planning on bringing a Nikon 18-300mm as a walk around and either a 35mm 1.8 with the D500 or a 50mm 1.8 with the D610. My question is, which camera do you feel will be the best choice, full frame or crop sensor (both are very good in low light situations)?