Charles, I too have a little different advice...if you don't mind hearing.
You are getting fine advice regarding Garmins - buy one regardless. You will not regret it.
BUT I if I had your condition, I would not risk going anywhere without two additional pieces of equipment. 1.) A good compass that wears like a wristwatch. Where it all the time regardless of where you are going. 2.) A modern smart phone with a real gps built in. Carry the phone all the time. Even if the gps on the phone isn't as good as the garmin, then you call someone.
I offer this for two reasons, one, is you cannot trust electronics and in your condition it doesn't seem like a gps is convenience. And two, I think you may be surprised with how often you end up somewhere in the "woods". Woods can be anywhere you cannot see the horizon I would guess. And since you didn't think you were gonna be in the "woods" you likely will not have your garmin with you. You could be chasing the dog or finding a lost baseball and inadvertently end up "in the woods".
Best of luck. And I give you great credit for staying after it.