You might be able to take out the dinette, depending on what storage bins or utilities are located underneath. Often the sofa is the better candidate for removal. Check the space carefully, what is needed for the recliners. Without the extra floorspace provided by a slideout, you might find that the recliners don't open as far as you would like. I've been running into this measuring recliners, and I have the extra width of a 30" deep slideout room. I will have to pull the sofa, water tanks are in the dinette bench.
Kind of sad you've decided that nobody can use the bed over the cab. On a small C or a truck camper, that is the primary bed.