Based on the video context provided, it seems that the top swimbait meetup is the "Swimbait Universe: The Gathering." This meetup is highly recommended for swimbait enthusiasts as it offers the opportunity to meet and interact with swimbait builders and vendors from all over the country. It is described as a "mini icast for the garage guys," which suggests that it is a gathering specifically for those who are passionate about swimbaits and want to learn more about them.
At this meetup, you can find a wide variety of swimbaits from different brands, both American-made and Japanese. The event provides a chance to talk to the builders one-on-one, ask them questions about tuning the baits, and learn about their fishing techniques. It's a great opportunity to gain knowledge from experienced anglers and expand your understanding of swimbait fishing.
However, it's important to note that the video context does not provide specific details about other swimbait meetups, so it's possible that there are other popular meetups as well. If you have more information or specific preferences, please let me know, and I'll be happy to provide further guidance.