I've been reading this thread from the beginning and I have to say, this is the strangest camping trip I've ever heard of. An extremely desolate campground with a toddler and two very elderly men? I assume the friend is similarly aged to great-grandpa. Why didn't grandma go? What sort of men of that age go camping together? I'm so confused about so many things with this case. My heart breaks for this baby.
Many oddities. Such strange. Wow.
My father was an avid outdoorsman, as were his brothers and friends. They camped, and fished, and hunted until the end of their lives (with exceptions of very sick old men). When it stopped being fun carrying all the stuff, they brought sons, nephews, grandsons to do the heavy work, which sounds like how this family might be configured as well.
I took my first child camping for the first time when she was 18 months. I'm not particularly fond of camping and now prefer "hotel camping" but it doesn't strike me strange at all that the family of mixed ages went camping together.
I'd like to know more about g-grandpa's friend, but it's not a red flag, imo, to have a friend.
ETA: Maybe grandma didn't go camping because she doesn't like to camp. Again, that's alone is not a red flag to me. JMO.