Reporting back our progress at finding a good solution to taking our bikes and kayaks along on our RV trips.
Regarding the hitch mounted kayak/bike rack the tech expert at Johnson RV told me about a few weeks ago - When I asked the hitch manufacturer about compatibility with our kayaks, the Co President suggested that 10' is the longest kayak that can be reasonably carried and the SOT might be too deep to leave room for a bike next to it.
Today, I spent some time with Bryce at Johnson RV. He said "no problem" with the 11" kayak; he has helped design hitches to accommodate 12 ft kayaks and they work fine. After seeing the specs for my SOT, he feels it will still leave room for the bikes - In my mind, worse case, I would need to get a shallower yak, but he really thinks he can make it work.
Bottom line is, now that we have the toy hauling issue more or less resolved, we can move forward with our plan to downsize to a B+ MH
(see thread: New MH ordered today)