Lots of good spots, you’ll be in Casco Bay which is a great fishery. The Spring Point Jetty in South Portland, under the bridge between Portland and South Portland on the SoPo side, Mackworth Island in Falmouth, and anywhere you can find access. If you want to travel 15-20 mins Scarborough Marsh, Higgins Beach, Camp Ellis in Saco, and my favorite Ferry Beach in Scarborough. If you just want to buy some chunk bait to save yourself some time hit up The Tackle Shop on Veranda St in Portland. Have a great trip, Maine is a fantastic fishery.