Stop by and I'll lend you my #6 - seriously.
We used a #5 for most of it and I walked it for a few moves. It would be a good runout without, so it's up to you. The OW is not hard though or very strenuous... but it is still nice to protect. So yeah, the 5 was fine, but the 6 would take you farther and the weight difference wouldn't be that much. But whatever, if you want to borrow a #5 you can borrow mine.
Doug