Kristin and I just celebrated our 28th anniversary this past weekend. 
How did we celebrate? Well, we went camping. Actually, we went moose hunting and stayed in a tent while we were in the bush. Yes, I am a romantic genius. Actually, it is interesting how this unique anniversary trip happened. (And btw, no moose were harmed in the celebrating of our marriage. Not yet.)
For years I have hunted and Kristin has not. We have always, since our courting days, canoed; more recently we began hiking.
One day this spring we were out hiking along the Peace River and I asked Kristin if she was enjoying herself. She said she certainly was! I pointed out that what we were doing- walking along through the gullies along game trails, looking for signs of animals as well as the animals themselves- was exactly what we would be doing if we were hunting, though in the latter case we would be carrying guns. I said “If you enjoy this you will enjoy hunting.”
Shortly thereafter, of her own volition, Kristin took the CORE course which gave her the right to buy a hunting license. We applied for a shared moose hunt and were drawn; hence the anniversary celebration.