Access for Sahlen 6 hours at the Glen

Hello this is my first time ever being to an IMSA race and to the track at Watkins Glen in general… what access do you get with general admission? Are you strictly permitted to just grandstands or can you go to different parts of the track like the infield to watch as well? I’ve watched a few videos n it looks like people go all over the place but im not 100% any info would be appreciated!!!