well if you do an early lunch (like 11 or 11:15) you'd prob be fine, but i'd do a ressie if i were u. Also, if you think you might wanna go at like 1 and end up there at 12:15 or 12:30, you'll prob get seated not too long after cuz you're early and not late.
However- u cant make those ressies thru disney as their not a disney restaurant. u have to call the restaurant directly.
407-828-8739