Yes, in kaytee's kiddie days I would be there too with my mateys as 'jaga kereta' kids to earn some pocket money, wakakaka.
So why are crowds pouring to Bukit Bendera tonight? Well, tomorrow, 20 February 2021, the Ninth day of the Chinese New year (of the Bull), is the MOST important day of the year for Hokkiens. Chinese devotees (not just Taoists but also Buddhists and Confucianists, especially Hokkiens - some non-Hokkiens also participate) like an early start to demonstrating their pious devotion to Tnee Kong on Hokkien's MOST important day of the year, hence the pilgrimage tonight.
For more on the history, tradition and why-wherefores of His Lord Emperor of Heavens (Tnee Kong meaning the Elder or Grandfather of Heavens) and Hokkiens, read my article on KTemoc Kongsamkok, link reproduced here for your convenient perusal.