Hi Jason, the best scenario I found is if you would relocate your cabin to cabin 7536, which is forward from where your are now. 7536 is an E-1 also. There is an inside cabin quad cabin#7535, just across the hall that's available as of now. All of your kids could stay in that cabin because you're close enough. The cost for all four kids would be $2,453.92. That price is what I could have booked if for today. I doesn't included any discounts such as senior rates.
I'm not an agent, but I get this kind of information from RCCL as a perk.
Hope this helps...