Make sure you carry 16 pounds of pressure in the tires, too, and take along tire repair tools. Flats are common, especially if Harley is riding with you. But you all can ride the west side of the highway in the morning. Ask Eugene, the park ranger, for a nice map to guide you. With that and a GPS or a good odometer, you'll be fine. In the afternoon, you and your son can ride the Indian Nations Trail to the west of the state park. Eugene has some maps of some nice routes there, as well. The trail up past the abandoned buses is cool, with some scenic spots. The INT to Muse is fun, but it's about 35 miles and can take four hours or more, unless you hustle. Or you could just make some nice loops closer to the campground and not get lost. There are some pretty easy trails east of the campground as well, if you just stay off the single-track. It's a nice place to spend a few days.