Unhitching safely on deep grass - slight slope

I use Anderson levelers under all 4 wheels on a slope, plus a big wood block under the tongue jack. Rock solid. And yes, keep the safety chains on and keep your fingers and body out of the way so you don't get pinched. I've even yanked the brake lanyard on steep hills as a backup just until I'm sure I have it completely stable, but be aware that it will still roll a bit until the brake magnets swing enough to actuate the shoes.