My DD had a very wide foot, and she could never wear Stride Rite. Her foot was very wide in the front, but her heel was not that wide, and she walked right out of every pair of Stride Rites, the store claimed were a perfect fit for her. We had a really hard time finding her shoes and they were always expensive. On the bright side, she is 8 now, and sometime when she was 6, her feet slimmed down quite a bit to where now she can wear a whole lot of regular sizes and styles. Sometimes she still needs a wide, but there is a much bigger variety that fits now. For WDW, back when her feet were wide, we found that the best shoe for her were Merrells. She did not even need a "wide" in them, like she usually did in other shoes. I think the style she used to wear was something like these:
http://www.merrell.com/US/en-US/Pro...4/Youth/Aquaterra-Sprite-MJ-Kids?dimensions=0
http://www.merrell.com/US/en-US/Pro.../Youth/Mix-Master-Jam-Mj-Kids?recID=185323064
You can probably find them cheaper at other websites.
Now both of us are addicted to Bernie Mevs as our Disney shoes. They are definitely the best shoes I have ever worn to Disney and DD loves them too. They are stretchy so even though they don't come in "wide" sizes, they should stretch to accomodate a wide foot. My feet are pretty wide too, and I love them
http://www.shoebuy.com/bernie-mev-kids-shoes.htm
I would also say be careful of open toe shoes at WDW. It is a crowded place and little feet get stepped on and shoes can get caught on things. My DD trips a lot over the front end of her own shoe if she has sandals that are open all the way across. We do the open toe Bernie Mevs at WDW, but it is more of a peek toe than having it all the way across.
Also, I would absolutely recommend getting Body Glide to avoid blisters. My DD and I are blister magnets because with wide feet, shoes tend to rub areas. I rub Body Glide over both of our feet at WDW and we never get blisters there. Pre Body Glide, I always got blisters on my feet at WDW. You can get it at most runners shops or bike shops and Dick's Sporting Goods sometimes carries it.