Semi with trailer? Not really. As Tiffany noted, you could maybe park it in the parking lot across the street and up the road, but I'm not sure what the clearance is on the railroad bridge that you have to pass under to get into the parking lot. Free street parking is challenging even for cars, so for a trailer, probably not. Best bet would be to stash your rig a few miles away and then take an Uber to the park entrance.
Not that I know of
There is free parking along the beach before you get to the entrance but it's normally full. There is paid parking up the hill going north from the entrance, but it's a long walk.
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