Lessons learned from the past two days:
If you have a wide foot (particularly women), ask for a wide boot!
If you have a wide calf (particularly women), the wide boots (Dalbello MX Super) actually have a lower boot cuff and sit lower on the leg than the regular Whitetail rentals.
You can also ask for a boot buckle strap extender.
Very good to know. My niece skis only 1-2 times a year and always rents. She's in college now and has learned to keep trying on boots until she gets it right.
I've always used my own boots even when only skiing once every couple years. Just got some new boots (last year's model) that are made for women. My old ones are from 10 years ago. Having something not as far up on my calf is very nice! Between those and shaped skis, I'm a lot better skier than 20 years ago.