Fly into Northwest Arkansas Regional Airport (XNA) rent a car and drive about an hour to Eureka Springs. There are also airports in Springfield Missouri, Tulsa Oklahoma and Branson, Missouri. Springfield and Tulsa are both about two hours away. Altho the Branson airport is just opened and I do not know much about it, it's only an hour away.
Maybe you should see about Quality Inn and Suites. (479) 253-5040
http://www.qualityinn.com/hotel-eureka_ ... mo=gglocalNot only do they offer adjoining rooms and suites, but they also have an indoor pool that would give your son something to do. It's a very nice hotel.
Jann Ortiz of All About Love can do your ceremony. She will come to you or meet you someplace.
http://www.eureka-net.com/weddings/-K