Three days in cornwall... advice needed

I used to take my bike down to st ives every year to paint, the coast road from there to lizard point through st just and zennor is beautiful, a few sharp climbs, often with a bastard of a headwind off the sea. Thee are two hills, windbeaten and covered in heather and gorse about 8 miles apart that I always thought were shaped like sleeping crocodiles, strangely similar. One time I was riding through the fog on the way back from lizard point and saw one of these hills, thought I was just 2 miles from home and sprinted over it. But I still had another 10 miles to go and had run out of food, I totally bonked and only just made it back. Dont stop at lands end it's a bit depressing. If you follow the coast around and back up to penzance the landcape changes in the lee of the headland, out of the wind there are beautiful woods to ride through.

That sounds really nice. I'm staying in Penryn, but we'll have a hire car. We're going to St Ives one day, so maybe we can have a morning there, then lunch, and I can ride back while the other half drives. Does this look like a sensible route?

http://www.bikely.com/maps/bike-path/possible-cornwall-ride