It depends on whether it is outdoors. Then you need to be prepared for a much wider range of conditions, like wind, snow, rain and sleet. Girl scouts should already understand some of that, but make sure they remember.
Regardless, many parents don't understand that ice rinks are cold!
I personally would make safety equipment other than gloves, long socks, long pants and a coat with long sleeves, "recommended" rather than required, because it is expensive. Most beginners don't use them, and have no problem. Though that might depend on age.
For beginners, the socks don't really need to be thin. That's to give people fine control. If anything, with rental boots, because of the (admittedly small) possibility of picking up a foot disease, and the frequent bad fits, I might go for something thicker.
I don't think show people the basics at a separate off-ice practice session first, as far as learning how to tie shoes tight (assuming they don't have the clip-ons, which I think most don't), marching, then marching with your toes apart, are out of line. You'd be surprised how many people benefit from those simple instructions. But I agree that a coach could be very useful too.