I believe Chris may be referring to Old Coast Road. If so, the north side of it starts literally just north of Bixby Creek Bridge. It goes for 10.5 miles through a mix of redwood forest and ranches until it drops you off back on PCH near the entrance to Molera State Park. There are some good photo ops along the route, including the famous shot of BCB from the east which is easy to take from or near OCR a few hundred yards after joining it from the north side. It is not one of my favorite spots for photography in Monterey County (for me, the drive itself is much better, but since you have so much time, you might as well check it out). I always take a 4x4 on OCR, but depending on road conditions you may be able to complete the drive with a regular car with no problems.
I grew up on the Monterey Peninsula and taught photography for a little bit there before heading to graduate school, so I'm pretty familiar with the area from a photographic sense. To help with your location planning, here's a little bit of what I've shot in the area over the years:
http://www.eaglerockphotography.com/f73027771.
Besides your main area of interest, Point Lobos (which, for me, is one of the top 5 spots for photography along the entire West Coast), I also really like Carmel Mission, the harbor in Monterey, the aquarium (still fun even though it is very touristy and over-photographed -- for photography, it is best to go in the early morning or in the last 90 minutes before it closes), et al. I'm guessing you already know about the McWay Cove waterfall at Pfieffer State Park south of Big Sur, but if not, that's another beautiful (if not very over-photographed) spot, especially at sunset during or after a storm. And like Chris said, anywhere south of Carmel along PCH is great at the right time of day (just be really careful for poison oak).
Please feel free to email me if you have more questions as you get closer to your trip:
info@eaglerockphotography.comBill