I bet that any local Pontiac dealer is happy to cooperate... when we did our first Shiner cruise a year and a half ago, we met up at a local dealer , Guzman Pontiac,... I called the sales mgr and spoke to him ,they were elated , very friendly...when we showed up there on sat morning they had the front row clear for us , plus offered us coffee and donuts...most all of the salesmen were out the oogling our cars, some were so young they barely know what they were looking at! at the end the dealer showed up, came out and said Hello to us all, and told old tales from his early days as a Pontiac salesman...in 1967 he drove a 67 Firebird convertible 400 from Los Angeles to Houston and back over a weekend (friday noon to monday evening),for a wedding , he said "it was fast"!
so pick a dealership, just call the General mgr or sales mgr, they will be happy to have you there,it brings attention to the dealership!