The feasts are crowded. I go to at least one every summer. I find the North End crowded in summer. It's got such a great vibe. One of the few great Italian neighborhoods left in the country.
Seaport area has amazing restaurants and can walk there, but lots of money. They have a nice walkway in and out of the old wharfs there. Great for a stroll.
Oh man the north end just had the feasts too. I believe there is another one this weekend. So many good places to eat.
https://northendregionalreview.com/2024/06/20/annual-san-gennaro-feast-returns-to-the-north-end/amp/