I know there was some local events here in the Midwest (Illinois/Wisconsin area) Not sure if anyone else hosted or had an outing elsewhere since 2009??? Contact wasilvers, a member from Wisconsin who has organized some rally's in the Midwest
Maybe some other member can chime in here with info on any other outings they had in the past??
I love your idea of organizing a national TinBoats event - somewhere that many members can participate. I organized the first one in 2009, along with Jim and other members who helped out at the Dale Hollow Lake. I actually drove down from the Chicago area to visit and assess several resorts on the lake and worked out special rates for our group. It took a lot of time and effort to bring it all together. I had help from Jim and other local members like BassNbob (who lives close to Dale Hollow) and others. Point being, to organize a national event, it will take a lot of time and effort AND help from other members to make it happen.
Go for it and try to make it happen, good luck and I hope you can organize a great outing/rally/get together for the TinBoats group.