I wouldn't use pre-cooked shrimp and I like to add crab legs. Measurements are good though.
I did Costco but Sams works too.Order flowers for wedding and arrange them yourself to save a ton of money!
Shrimp Boil | dinner party with sam's wholesale club - bystephanielynn
Sam's Wholesale Club Is Better Than Costco For The Following Reasons | Fun Times Guide to Money Saving Ideas
The best things to buy at Sam's Club for planning a party, great cheat sheet from playpartypin.com
Hosting a Shrimp Boil with Sam's Club
Bubble Gum Party Favors from Sams Wholesale.