This works for us. Pump water tap connected through bilge to 10 litre water bladders under v berths We only use the slide in butane stove at anchor with pop top up. Gas cartridges always stored in ventilated port locker.
*** warning***** the Investigator cockpit lockers are not sealed. Often wondered why I could smell my petrol tank from inside the cabin! I had to spend many happy hours glassing them in
My v berth insert doubles as a pull out chart table under the stbd switch panel.
We sleep heads to bow. Porta potti in cockpit under awning -great sitting on potti at 3am watching the moon and stars and listening to the waves lapping