High altitude settings

Hi, 1st post,
I actually own a 2015 Grizzly 700 but this question is relative to a 06 660 (Carb model)
Last year we went to Colorado on a ATV vacation (I actually took my 14 Kawasaki Teryx which is fuel injection so no worries there.
While we were there, we saw at least 6 bikes with major carb issues (at least 12,000 ft)
We going back in July and my friend taking the 06 660.

My questions would be, what setting should I put the air screw at and what main jet should I go with, everything is stock right now and we live in Louisiana.
We will be on average 9500 thru 13,000 ft above sea level.

Thanks in advance guys, been reading the forum a while and decided to post….
Phil.