No, not really. Most CS's at MK don't really have tons of outdoor seating. And those that do will surely be blocked by folks lining the parade route. Now if you wanted to eat at Columbia Harbour House (excellent tuna sandwich!), you could sit upstairs and see the parade from a window there. But the windows don't open.
Wishes - for your first viewing, you should really watch from Main Street as that is how the whole show is set up. Besides, would you be eating dinner that late?