What is the best camping gear for a large dog?

I have a wonderful 70lb mutt and I cannot stand the thought of leaving her for vacation, so I’m adjusting my vacation plans to better fit her needs. Instead of flying, I’m driving with my boyfriend and four year old dog 2,000 miles. I’m wondering what you all have used to keep your dog comfortable on a road trip. Unfortunately, because I can’t drive stick shifts, we’ll be driving my kind of small car (Saturn Ion 2004) that will not fit her crate. How can I keep her comfortable in the backseat so she’ll be secure and able to sleep during the drive? The backseat consists of 2 bucket seats divided by a black console type thing that I could maybe lay blankets over… If there is some type of car bed or something for my big dog, could you link me to it?

Also, when camping, I do not want to just tie her to something. There will be times we have to leave her to shower and things like that, never more than an hour or so though and we could always take turns going somewhere she’s not allowed. I was looking at something like this: http://www.petco.com/Shop/Product.aspx?sku=1216449&pd=recentlyviewedproduct
but it doesn’t secure to the ground, so if she wanted to she could escape very easily through the bottom. I want something secure, safe, roomy, and comfortable; yet easy to assemble, lightweight, and kind of concealed. Should I just bypass this whole idea and keep her in the tent? When we’re out of the tent, I want her to be close by but not getting tangled in the lead and everything else… This was so much easier when my dad had a popup camper!

Any solutions? Any suggestions?
Thanks in advance.