Love it down there.
Be careful with your dates as it's the G7 summit in Carbis Bay early June, don't want to run into that traffic around St Ives
Stayed Fowey last year was great, really enjoyed it, would recommend to anyone.
Back to St Agnes this year in June myself, beach restaurants and pubs all in walking distance.
aiming to do a few of these on North Coast this year
Tintagel Castle
Perranporth Beach
Trevenaunce Cove
Crantock Bay
Bedruthan Steps
Port Isaac
Porth Towan Beach
Padstow
Would recommend the below 100%
South Coast
Charlestown - Old World Harbour
Polkerris - Really nice small cove with restaurant, surf shop, pub
Polperro - very quiant fishing village, no cars in the center, reminded me of Clovelly
West Cornwall
Porthcurno - Lovely Beach and the Miniack Theatre, Pedn Vounder beach nearby as well
Kynance Cove - Best beach I've been to in UK, bar none
I would avoid Looe and Newquay
Oh and stop at Gloucester services