Hi Karen:
Dining at Walt Disney World is a fairly casual experience, so in general, a nice pair of jeans and a collared shirt, or even a decent tee-shirt and pair of shorts will suffice. At the restaurants you note above, jeans and a nice shirt will be acceptable. The dress of the other patrons will run the gamut of jeans, khakis, dress shorts, capris, skirts, dresses, collared shirts and nice tee-shirts.
Clothing generally not permitted at Disney World table-service dining rooms are tank tops, swimwear, caps, cut offs, torn clothing, and tee-shirts that display offensive language or graphics.
Note that at Disney World's delicious and award-winning dining experience at
Victoria & Albert's, the following "Proper Dining Attire" is required:
Men: Dinner jackets with dress pants/slacks and shoes. Ties are optional. (Please no jeans, shorts, sandals, flip-flops or tennis shoes.)
Ladies: Cocktail dress, dressy pant suit, skirt/blouse or nice dress.(Please no jeans, shorts, capri pants, sandals, flip-flops or tennis shoes.)
Happy dining and enjoy your vacation.