Any where between Looe and Polkerris you shall find ample slippage. Fowey side by the ferry is free with car and trailer parking and good access. Opposite bank upstream is Mixtow/Penmarlam, bit more of a pain to get to, only because of distance from anywhere but at £9 per day seems expensive. However there is slippage, cafe, toilets and showers, parking included, flushing water and a chandlery.........so actually amazing value, and visitor moorings and bank/pontoon loading.
Polruan has a slip. Park at the top and wander down to assess access.
Polkerris slip arranged via cafe (on website) and has moorings at £5 per day. Here you get straight out onto open water.......pub and restaurant and parking, beach showers here too.
So, huge variety in this small area.
Large boats (dive and twin engines) usually launch from Fowey and Penmarlam.
The other slips are really more suited for 4-6M boats.
Plenty of temp moorings on the Fowey alongside pontoons for lunches, supplies etc. Also Royal Fowey Yacht club and RNLI are welcome stops.
Fantastic coastal runs and many sea access only beaches east or west.