Less is more ... I'd loose the cooler and buy lunch ... esp if your only traveling for 3 days.
I just drove down both Skyline and Blueridge parkways. I started in Front Royal and my destination was Asheville NC. The parkways are stunning, just smiles and beautiful vistas all the way. In contrast, I81 is an accident waiting to happen. Stressful is an understatement. Big thumbs up for the parkways. However, if you've only got 3 days you won't make it home if you drive this distance on them. I underestimated how long it would take to drive them both.
I have a 2008 klr and replaced the doo at about 4k miles. It wasn't broken but I'd say the stock spring was not sized properly and had no where near the tension of the replacement part. I wouldn't worry about it if I were you and I don't think your going to fix this on the road. I worked in my buddy's garage and we had to make a tool for the job .. an offset wrench. So, your also looking at special tools. Easy job though ... once your home.