we were in nam until 75.
For a good vietnam loadout, resist the urge to collect and wear every piece of kit you can get your hands on. the more veteran you were in nam, the less crap you would be carrying around with you from your issued gear. lots of stuff you don't need on patrols and ambushes. your list looks good to go, like CP said, I would add some canteens and a combat knife, K-bars were sought after, but the issue bayonet would be legit for army loadout.