Somewhat urgent question

Hello! Camel Defender trophy edition owner 110 with Goodyear AT tires.

I have to go down a pretty steep hill in snow / ice tomorrow…I’ve done it before but I did it in low gear w/hdc. I started sliding really bad the last time and just about lost control…i think the car threw the parking brake on for a second maybe as I found myself stopped with hold displayed.

Thanks in advance!

(I have tons of experience as a RR owner since 2013 with terrain response 1/2 just not in the camel in snow)