Beautiful scenic drive and must see when visiting the Redwoods. Also, be sure not to miss Cal-Barrel Rd. - it is an unpaved road that winds it's way deeper into the grove.
We drove through the parkway and stopped along the way for pictures and shorts walks. Traffic was light the first week of October so we had no problems pulling off to the side when we wanted.
There are a number of trails in this area but we were unable to take full advantage based on time constraints. We would do so in another visit.