Thanks. I understand the date of overnight permits is the entry date, and for most people that means one night, but there nothing stopping someone from staying several nights if they really wanted to, is there?
Exit date isn't really important. Just specify your exit date when requesting/paying for the permit on rec.gov.
Unless you're a month after your exit date, they are unlikely to care if you're a day or two late getting out of the wilderness. I usually pad my exit dates a few days.
