Basalt Rock Café is a useful lunch stop on campus, with soup and sandwiches, cheese plates, pastries, and local beer and wine. You can visit the café without museum admission. The Columbia River Trading Co. sells locally made art, ceramics, clothing, toys and books, and it is open to shoppers on its own as well. Restrooms, drinking water and picnic tables are available; wheelchair accessibility is listed, though exact grades for the outdoor paths are not specified.
The approach is straightforward from I-84: take Exit 82, follow the Historic Columbia River Highway for about 1.5 miles, then turn onto Discovery Drive. The museum, café and outdoor paths each make a different kind of stop, so choose the mix that fits your time. If you only have a quick break, the riverfront grounds can be a shorter visit; to understand why this center is more than a scenic pullout, leave time for the exhibits.