Yeah, I ended up powering through, though more due to a lack of options than anything else (McD's at Lincoln was full of drunken students and didn't carry a sleeping bag or bivy). Had some weird hallucinatory moments at night, but apart from that it wasn't too bad.
Doing my first 600km this weekend. To sleep or not to sleep... Plan is to have a snooze at the McD at km 350.