Heidi of 101 Cookbooks has a yummy-looking recipe for homemade power bars, accompanied by a bit of how-to video and some footage of her trip to Big Sur where she ate them. She also recommends a few variations on the recipe, as well as where to stay (Treebones, a coastal "yurt hotel" I've mentioned before - she recommends #8 or #15) and where to hike (Julia Pfeiffer Burns SP, on the Ewoldsen Loop).
The Ewoldsen Loop is indeed a beautiful hike, and is just nearby of the best spots to get a look at McWay falls, a beautiful little waterfall that ends in the bright blue-green cove - the water is so clear, it feels like Hawaii or something. There's a quick but crowded spot to check it out, starting at the east end of the Julia Pfeiffer Burns SP parking lot.
I also recommend taking Partington Cove trail, which is also in the JPB state park but has a trailhead about 2 miles north, just off of Highway 1. It really looks like nothing - you park on a turnout just off of Partington Creek Bridge, and head through a cattle gate down a steep fire road. It gets brushy after a bit, and the terrain keeps changing - next it's redwoods - until you pass through a little tunnel and suddenly, you're on a rocky little landing. When we were there, the only other poeple we saw during the entire beautiful hike were a group of local teenagers picnicing - fishing, playing the guitar, and completely ignoring our existence, even when (especially when?) we started freaking out because we saw a whale. There's also another fork along the trail that leads to a spectacularly private cove - tons of rocks to scuttle and scramble over to get to the rocky beach with huge crashing waves. Stunning.