Yeah, I'd start out with stock jetting, and take some plug reads (and note the outside temps when doing so).. If it happens to be in the upper 20's (lets say 29F for example) when doing a plug chop/read, and the plugs appear to read perfect!..
that could mean a possible burn down while blasting across a lake in the single digits..
Better safe then sorry! Start big, and work your way down..
and run GOOD gas!. premium minimal..