I didn't read through all of the ideas that have been shared yet, but I did have a couple of thoughts as to what I'd like to see.
01. Personally, as a nod to last Autumn's release, I'd love for the guys to include songs like "Cabinessence", "Wonderful", "Our Prayer" and (most of all) "Surf's Up" as a regular part of their set. The early setlist returns from opening night (while awfully encouraging) didn't include these songs, and I think that it would be a gesture really welcomed by the crowd (as an aside, the vibrations I'm picking up are telling me that June 29th, in some place called Darien Lake, NY would be just a
great time to perform "Surf's Up" - not quite sure what to make of it, but fellas, if somehow you're reading this, it might be a good idea).

02. I think it would be really cool for the band to play a few shows in Hawaii. As an upstate New York land-lubber, I'm sold on the magical image of the place, and to me, just as California is the epicenter of the fun and sun side of the Beach Boys, Hawaii suggests the spiritual essence of the ocean, and of the group. Also, it occurs to me that, while admittedly unsubtle, there are worse ways of celebrating fifty years together as a group than by ending your tour playing in the 50th state.
03. I think we all want this, but I'm really rooting for a blu ray concert release at the end of all this. If not all taken from one terrific show, I'd like to see the performances come from different venues and cities that say 'Beach Boys' (Los Angeles, hopefully Hawaii). Failing that, places / performances of note (NYC, hopefully Europe, opening night, closing night of the tour, etc.) would be welcome.