Just to clarify for anyone doing a search:
MK is Magic Kingdom park in WDW in Orlando, FL.
DL is Disneyland park (the original) in Anaheim, CA at DLR (Disneyland Resort).
Both parks in both states have hot dogs, so I'm sure a search would pull up numerous results (which could be confusing).
Agree that The Little Red Wagon in DL has great corn dogs. For bratwurst, Troubadour Tavern by the FL Theater is good. Refreshment Corner on Main Street has hot dogs, chili dogs, and a mac'n'cheese dog. All have good reviews. In DCA, Corn Dog Castle has a spicy corn dog that gets very good reviews. Award Wieners has a variety of hot dogs and usually offers a special hot dog tied in with whatever the current theme is, e.g. special movie tie-in or seasonal theme.