Sorry to be late to the party, I guess you’ve probably figured it all out by now. :-)
I have hundreds of nights on the trail with dogs (sometimes as many as three) so I’ve done a lot of trial and error. The things people worry about are usually not a problem. They are obviously at home in the wilderness, and tent sleeping also comes very natural to them.
My current dog is short-haired, so she carries a fleece jacket in her pack, and I put my puffy on her if it’s really cold (35-45 is not cold, even for a short-haired dog). I just tie the sleeves loosely around her neck, start the zipper under her belly, and she’s happy as a clam. I also bring a small piece of blue foam pad (do people even know what I’m talking about?) for them to sleep on if it’s cold.  You don’t want her on top of your quilt IMO. My current favorite tent for one dog is the Zpacks Altaplex. While it’s nominally a one-person tent, it bulges out at the middle, which is perfect for a dog.
Toys are completely unnecessary if you are hiking far enough each day and she’s carrying her own stuff. However, I do like to bring snacks (Milk bones are fine) for her to eat during the day. She carries all that. Rationing food is a good idea for convenience, and bring extra since they are very active on the trail. I don’t normally need to worry about water, they find their own. A super lightweight bowl is handy for several reasons. I have an old dented aluminum bowl that goes in her pack.
You rarely use a leash in the wilderness, so just make a lightweight leash from 1/4″ webbing and an aluminum biner, and leave it clipped onto her pack so you can grab it quickly. On very rare occasions, they will puncture something, so make sure that you have your patch kit or a bit of tenacious tape. They get the tent pretty dirty if it’s wet, so try not to freak out. A little mud won’t kill you, just go to sleep and shake out the tent when it’s dry.
Practice a lot with her pack ahead of time to identify chafing spots and make sure the back is well fitted and adjusted. It can be tricky so do long hikes with weight in the pack. Real dress rehearsals. Chafing is not fun for them. Practice with thunder and lightning at home if possible.
The biggest issue is first aid. Over the years, I’ve had to deal with 10 canine issues for every one of my own. You need to be prepared for injuries to their feet and claws, chafing from pack straps, multitool pliers for porcupine incidents, etc. Fortunately, they are incredibly tough and stoic, but they are also pretty much unprotected. They won’t always tell you if they are injured, so you need to check them carefully at least once a day. They are not good in heat. Honestly, you just need to avoid that entirely with dogs. If you’re accidentally caught in warm conditions, try to get them completely wet pretty frequently. Heat stroke is not fun. Hail is also an issue; they don’t like it. Have a plan.
When your dog gets to be middle aged, get another puppy. The older one can carry some extra weight for the puppy the first year, and then a couple years later, the young strong one can carry extra weight for the older dog, and you can all keep going. Seriously. It works.
Sorry if I made it sound complicated, but I’m just trying to share 20 years of experience in a few paragraphs. Once you get it dialed in, it’s easy, and there’s no better hiking companion.
