The thing is the boat at Disneyland is actually the grand steamship Mark Twain. The same boat that not only opened Disneyland on July 17th, 1955, but the same boat where Walt and Lillian hosted a wedding anniversary party for friends and family two days before Disneyland opened on July 15th, 1955. And the same boat in the 21st century that Disneyland visitors can ride all day around the Rivers of America, if they don't want to ride the Sailing Ship Columbia. And when Fantasmic! debuted at Disneyland in 1992, the Mark Twain subbed in nicely as the boat from Steamboat Willie, the cartoon short considered the formal debut of Mickey Mouse in 1928.
Although to be fair to WDW's version of Fantasmic! that opened in 1998, their smaller and much simpler version of the riverboat...
Looks more like the 1928 cartoon version of the very humble riverboat from Steamboat Willie...