Congrats on your camping trip! Bonnie Snodgrass here. I just wanted to give you a little advice about the stirrup fence posts that you bought. I also purchased a dozen of the same posts because I had one horse who would challenge a lower fence and go thru it. It is hard to find taller posts!
Anyway, the stirrup post snap off rather easily at the bottom. The metal rod/spike at the bottom just ends at the stirrup. In a post without the stirrup the metal rode continues up inside the plastic post for several inches. I learned that you just have to be careful not to twist or bend the post, particularly when you are pulling it out of the ground or trying to get it into hard ground. I like to keep something in my fencing kit (like a huge screwdriver) to make holes in hard ground so I can easily push fence posts and ground rods into hard ground.
I did notice that Slypner has 60" standard fence posts for sale. I also bought some of those elsewhere and found they are sturdier while being longer/taller than the black posts that are for sale everywhere. I found the 60" posts where a much better deterrent to one of my taller horses that liked to lean over the fence. Better for a dividing fence also. I frequently camp with a friend who is owned by a mare. My boy Mouse adores her and vice versa. I usually provide the fencing and use the taller posts for the fence line between the two. Much better separation fence.
Bonnie AKA chicamuxen