The Buttermilk Ranch dressing can be made a day ahead. Also, my ranch recipe here is on the thick side - you can always add a bit more buttermilk to thin it if desired.
If you transfer the shredded chicken from the crockpot to a bowl or something, be sure to add plenty of sauce from the crockpot to keep the meat moist.
Calorie count is purely an estimate calculated using an online application to serve as a guide and not to be taken as accurate nutritional information. Percent Daily Values are based on a 2,000 calorie diet.