Yes time is marching on quickly isn't it?
5th May departure lol
The orientation trip on the first full day up to Castellabate (we only had a quick look round last time) and then back down to Santa Maria is only a half day trip ( a nice gentle introduction to the immediate area). Some people took the option of walking back along the beach to San Marco last time. Santa Maria is bigger than San Marco (more like a very small town), and there are some nice places to have a drink, and one really nice open front restaurant (if it is open) right at the begining of the beach in Santa Maria which I can highly recommend.
The Paestum trip is well worth while, plenty of time to look round the ruins and pick up souvenirs. Then off to try some of the local eatables! I have a feeling we were back in the hotel about 4pm.
The Salerno trip is new to me but I am presuming (given the distance) that it is a three quarter day again. Eila Velia is a half day trip. I missed that last time so it is a must.
People I was with spoke highly of the Amalfi/Ravello trip although it was a fair distance on the coach. If I am tempted by either of the optional tours it will be this one. Cilento National Park is stunning though.
So yes. Plenty of time for a long walk, up to Castellabate on the bus and even a bit of time on the beach. LOL