That is most likely the best approach. That said I don't know what powers the camera switcher; it is supposed to be the power antenna lead from the radio.
On ours if the use/store switch is placed in store the dash radio goes off.
If you pull the fuse in the distribution panel marked radio it goes off.
Those two make sense.
Now for the gotcha
. If you pull the 15 amp fuse under the hood that is a power source for the Trombetta isolation relay and B.I.R.D the radio goes off. When we first got our coach that 15 amp fuse was wired to the cranking battery side of the Trombetta isolation relay. For ours I have moved it to the house battery side of the relay per both Intelletic and Thor wiring diagrams. Our cranking battery had gone dead and with the relay power on the cranking side of the relay the Aux start did not work!
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