The sodium levels in products here are color coded, as well, usually right on the front of the package. Low sodium is green, med. is orange, and high is red, as represented by a dot on the front, and it also lists the amount of sodium per serving on the front of the package, normally (along with calories, fat, etc.).
As far as veggies and stuff goes, I've noticed you can get no salt in most tinned veggies (I like to add salt myself so I try to buy the no salt varieties) and even for baked beans here they have low salt and low sugar varieties. The plain frozen veg never seems to have salt added. I think you will be ok.
