Mike, yes, the Burbank reunion was in 1998.
A similar event was held on the East Coast in 2000 as part of Project 51, which accompanied some of the artifiacts from the show being donated to the Smithsonian in Washington, DC. Jim Page was similarly involved in this. By then, Bobby Troupe had passed away and Julie London was not doing well. Cast members Mantooth (Johnny), Donnelley (Chet), Lopez (Marco), Stoker (Mike), and Pinkard (Dr. Morton) all were in attendance, as was Squad 51. For the main public event, at the Hyattsville VFD station, over 5000 people attended from all along the East Coast and Canada. It was amazing the fan base that still exists!