You might want to rethink that. While the park has been pretty loose on the day use rules in the past, those days are over. Even if you're camping in the Bivy. After dusk use of any day use area or facility at Smith Rock is a no-no. If your car is in the lot expect a ticket ($110) in the mail.
Back in October Deschutes County took away 97 overflow parking spots on the west side of Crooked River Drive.
The 97 removed parking spots along the west side of Crooked River Drive just south of the park entrance sign are making parking tough on these Indian summer days. If you head toward the RV lot you'll usually catch the short-termers that snag a quick photo and leave. Same at the far end of the road into the parking area at the Turnaround parking lot.