Yes, I camp a lot. Often alone, when staffing checkpoints on mountain marathons, most recently OMM in Northumberland in late October 2014. Next time will be 2 nights over Easter, meeting a group of friends at a campsite in Lake District, for a 50th birthday. My partner went off with another woman 2 years ago, so now I camp alone when I choose, instead of waiting for me to have a weekend off and havign drive all the way from Cambridge to somewhere hilly, as he never learned to drive.
Can you compromise with your wife and use a camping barn? I stayed in a camping barn at Edale in November to be ready for an early start helping on a RAID 3 navigation race. That one was very basic, so I took my own head torch, stove, sleeping bag & mat, but some have mattresses, electric lights, flush toilets etc. Had whole barn to myself, so disturbed no-one when I got up at 0600.