Tomdi

How do I book a panoramic ocean view. AND. On what ships are they available?

Regarding motion sickness, you're sailing out of Galveston and the ports you are going to are pretty close by.  Assuming no storms in your way, there isnt a whole lot of movement because you don't have far distances to go and the Gulf is quite quiet in that area.

My thought was that there are very few cabins in this area so it will have little traffic. Also that it is so close to the pool deck where we spent much of our time while on board the Enchantment of the Seas last September

You can book via Royal Caribbean directly or contact a travel agent to assist you in booking one.
 
These cabins are on Navigator as well as Enchantment, Grandeur, Rhapsody, Splendour and Vision