HT - if more guys your age did this, we'd have a lot less problems! ,
-Get an edible wild plant book and concentrate on the safer easier to ID species like cattail, greenbrier, mayapple fruits WITHOUT seeds or other parts of the plant, ect.- once you collect and use them, they'll be part of your wilderness Kung fu forever.
-I second not trusting chlorine - Giardia got me on a wilderness adventure down by Latrobe - we spent a few days drinking that famous limestone "RR" water without boiling or using tabs for purification
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19 year old "Mr. Woodsman" (me) insisted chlorine was fine. My buddy still brings it up and hassles me 20 yrs later....
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-Maybe take some peanut butter and victor traps for squirrells?
-If a snake gets ya DON'T tourniquet it!
Good luck, more than a few on this board envy you for being able to do this!
John