You only have to have one bad night during camping to fully understand what you're talking about here! The closeness, the thick air in a tent, with or without ventilation, or farts for that matter, and all the little noises outside! All of that aside, you and your wife holding hands for a brief moment ... that feeling when your fingers touch and all the unspoken words, memories and feelings that go with it ... so beautiful!
I do have some wonderful memories camping with my boys as they were growing up; and they have some of the same! Such lovely bonding time and a chance for everyone to just be in nature.