I used to winter camp with my black lab a few times a year. She was always on the go, except when she wasn't. Meaning, idle time was the worst for her, especially in the winter. So I'd keep moving a lot.
When pulling into camp, the priorities were: get her fed then a tent assembled and bags rolled out. It's tough when it's solo....much easier with a partner. After she'd eat, she'd go into the tent, and roll into her ball. I'd cover her with bags and she'd be warm. Later, whe we'd go to bed, she'd be let out once to do her thang, and we'd get the tent set up. Here is another reason where a partner helped, as she would sleep between us. I would usually unzip my bag and lay it over her and spoon her.. If it was real cold, and I needed my bag zipped, I'd lay a fleece blanket over her while she was between us. I'd check her often during the night, and she never felt cold.
The only real problem was the mornings. She would want to get going right away, and to dissamble everything, pack, and eat takes up to two hours sometimes. Those were stressful times for her.
And, yes, I always have a closed-foam pad(s) that would go under my inflatable pads, so the floor was always lined and off the snow/cold ground.