For health reasons, I usually try to keep my sodium intake fairly low. However, most freeze dried dinners offered in camping stores contain an more sodium than I'm looking for. I consider 800mg a serving to be fairly high, especially considering I most likely will eat two servings to refuel after a long day of hiking. Are there any products that don't have as much sodium? Ideally, I want lightweight, reasonably priced ($10ish for an entree) food with a low sodium content (200mg/serving) that I can take backpacking with me.
I see that a good option on the sodium is to buy the components (vegetable medley, cooked beef, green peas, etc.) which are all lower sodium than the premixed meals. Instead of buying dehydrated/ freeze-dried meals, start looking into dehydrated/freeze-dried ingredients. This page has a good list of source for ingredients.
Make it yourself:
Mountain House has the following in that sodium and price range (I'll keep adding other brands and meals as I find them). I'm including some that are over your limit because you can mix and match to get the proper average.
Backpackers Pantry has the following options from here.
I would recommend making your own.
I've used a bunch of the recipes from FreezerBagCooking and found them generally easy to make and incredibly tasty. You can adjust them to fit your budget or sodium needs.
The general idea is that you use a "freezer" ziplock bag (basically, the thicker kind) and put all your dehydrated ingredients from the recipe into it. On the trail you can pour boiling water directly into the bag (same as the store bought ones) and seal them, wait for however long, and then eat directly from the bag.
Here's an example recipe (I've made this one, but substituted a tuna packet for the chicken):
Chicken Diablo Rice
Instructions: At home in a quart freezer bag pack the dry ingredients. Pack the chicken with the bag.
On the trail: Add chicken with broth and 1 cup near boiling water. Stir well, seal tightly and put in cozy for 15 minutes.
The site also has lots of tips on how to make/procure lots of the ingredients, including low sodium options.
We had the same concerns - the sodium levels on most freeze dried foods are appalling. We bought from Pack Lite Foods and were not disappointed. We only tried the dinners, so can't comment on their other meals. The dinners were tasty and the double servings were the right amount of food for two.
Mountain House has a low sodium line of freeze dried for long term storage and/or hiking/camping. They are about 250-350 mg/sodium per meal and even Wal Mart carries them individually at about $8/packet. Great for emergencies, hiking/camping and survival. Stay safe.