Antarctic Parka make my own??

Well my wife insisted I have a chuck-out and make room for important things like her daughter and grandchild.
While cleaning up I found some old stock Ventile fabric I purchased in the late 80's, very heavy very tightly woven windproof cotton and VERY expensive if I had to replace it.
I want to use this to make a proper Antarctic style smock.
Does anybody have any proper patterns ? If no patterns exist I will ask for help with sizing and design features.
I know basically what I want.
Half zip to the waist and pull-over style.
Big double fabric hood big storage pockets below the waist and smaller pockets on the breast. drawcord waist and skirt but "WHAT ELSE"?????
While cleaning up I found some old stock Ventile fabric I purchased in the late 80's, very heavy very tightly woven windproof cotton and VERY expensive if I had to replace it.
I want to use this to make a proper Antarctic style smock.
Does anybody have any proper patterns ? If no patterns exist I will ask for help with sizing and design features.
I know basically what I want.
Half zip to the waist and pull-over style.
Big double fabric hood big storage pockets below the waist and smaller pockets on the breast. drawcord waist and skirt but "WHAT ELSE"?????