I have a vacuum sealer and I want to cook rice seal it and take it on extended pack trips where there will be no refrigeration. This will help cut down on fuel. Trader Joes, Kashi, Uncle Bens, etc… sell bags of cooked rice this way. Does anyone know if this is safe to do [...]

You don’t really need to go to that length. Keep it in an airtight container and stick it in the freezer. You’ll use it all up before it goes bad.