It's a doddle. You should be on neaps by then, so rounding the point shouldn't be an issue. Stay offshore a bit rather than hug it tight.
Find Kynance on your plotter before making an approach, it's not visible from the sea. Approach via the right hand side (Lizard Point side) when coming in, it'll become clear why when you're there.
Don't bother with Kynance if the wind direction has a W in it. It'll be lumpy in there and getting ashore could be challenging.
Avoid high water, as there will be no beach at all.
Get it right with wind/tide/weather and you'll think that you've slipped through the back of the magic wardrobe. It's that nice. Shusssh.
It's a 1.5m walk down a goat track to get there by land from a NT car park.