Belated reply to the above - just prime as normal but at a lower rate. For stout/porter, I'd be looking at 1.8 vol, no higher than 2 if you prefer more fizz.
I gas my stout kegs at about 120 kpa for 24 hours then just top up the headspace when the pour slows. Also not served cold. 10+ degrees for me.
Just kegged a stout originally cubed with a handful of toasted Glen Moray soaked french oak chips.
I ferment in the cube so oak remained during fermentation.
Beautiful stout, distinctly oak/red wine and vanilla.
Be good to see how it ages. Oak and beer are slightly distinct from one another atm, thinking time will help it integrate but I can vouch for the NC oak. Been meaning to try it for years (well ever since reading this thread)