Pretty sure her dad would NOT be proud of her
I was stationed in Quantico, VA in '70 and '71. Mayday one of those years demonstrators tried to breach a number of bases. Attempts at the Marine base at Quantico were unsuccessful, they were met by armed Marines at the main gate and a water tanker with a high pressure suicide nozzle at the back gate backed up by an armed squad. (I was one of the guys on the nozzle...FUN!)
Ft. Belvoir did get breached by a few, including Fonda. Henry Fonda's reaction was they could keep her in the stockade!