We have camped with our new GSD our 5 times since he was four months old and he is now 6.5 months so he got used to it early, but we still prepped him with short hikes on trails at home before we left and camper beforehand we left. Our old dog was a 2 year rescue before we got her and took her camping too. They both have done great. We tent camped before with our old dog and she slept in the tent with us no problem. Will all of the excitement, hiking, new things to explore, etc...you will probably have no problems with him being so tired that he will go right to sleep beside you in the tent and be just fine.
You didn't say if you are packing into a remote area, campground, or what but at campgrounds around here (state parks especially), dogs are required to be on a 6 ft leash at all times. We did, however keep a bit of a longer line on ours and no one ever said anything.
For our youngster, we stop every 2 hours for a potty break...make sure we gave him plenty of exercise before we hit the road and he pretty much sleeps the whole way.
When you get there, before you even set up the tent, let him explore the area a bit to let him sniff and get to know the area. We always take one of those big water jugs (like on the sidelines at football games) of clean water plus a few gallon jugs in the back of the truck for extra. We also have a uv light water purifier if we need it.
Backpacks are great for dogs if you are doing long hikes, but what I think is more important are boots. Here, we have cactus and lots of rocks so we use them to protect their paws. We had to turn around once on a trail because there were so many little cactus thorns all over the place. For water, I carry a collapsible water bowl and pour water from my own bottle or camelback bladder for the dog.
For fire, watch the dog like you would a toddler. Keep the dog on a leash and don't leave him unattended. By fire time, our boy usually is exhausted and will just sit by me in my chair while he waits for his hotdog to be done! :-). Camping is so fun for our dog and it is the one place we let him eat "table food"...a fried egg, steak, and hot dogs. He loves it!
This year was the first year we have upgraded to a popup camper and we love it, but have always tent camped before. Oh, other tip is to make sure you get a can of bear spray. We had a bear in our camp last year and scared me to death! It went away on its own (we didn't have any food out), but wild animals will know/smell a dog and may be curious. We carry our gun and bear spray. Mountain lion encounters happen here an lot...one came into a camp near Tuscon last year and grabbed a dog and ran off with it! Yikes! Samson heard his first coyote howls last weekend camping, gave a couple of GSD head tilts at me, and went back to sleep.