I called Ship's Services and the gal I spoke to said for a 7 day cruise, you do get all those amenities for the Lido cabanas - price is $199.00
The ones on the Observation deck are $299, which include breakfast and lunch.
I don't know how anyone can sit in one of these Lido cabanas all day long when the ship is in the Caribbean. It's bloody hot on that deck, even if the dome is open.
I see you are going at Spring Break - lots of luck with all the kids running around the deck screaming, yelling and jumping in the pool.