Wow...I'm from South Carolina and NO WAY there is anything finer than a Low-Country Boil! I love fish but it does not come close to a good, well seasoned Low-Country Boil!.
I doubled the seasoning amount, added 10 very small red potatoes with the onion, skipped the sausage (vegetarians in the crowd), added one king crab leg broken into 3 pieces, some clams with the shrimp. I assume the onion & peppers are seasoning only because they were mush by serving time. I served with Baked Cheese Grits (cheddar, monterey jack), green salad & garlic bread. Everyone loved it - spice was just right for the diverse group we had (some spice lovers, some spice wimps.
I spread out newspaper on the table outside and dump it all on it then roll up and throw away ..no clean up!! Also try adding artichokes and serve melted butter for the corn and artichokes