Sledding tomorrow please help?

so me and friends are gonna go sledding at this humongous hill 2morrow since we dont have skool tomorrow:D in nj its gonna snow about a foot. however idk what to wear to go sledding cuz i dont go really often:P i have boots. i have snow OVERALLS but i dont wanna wear them because we need to run alot and stuff and the hill is steep. it also makes me look fat and feel like im carrying a truck load of stuff. yes i have a jacket too and hats. thanks:)