After serving in the military has anyone else lost interest in shooting or camping?
Heck no! I could hardly wait to get out and get back home to Idaho where I could take up duck, goose, pheasant, deer and elk hunting again.
And camping - although "camping" was usually a part of my family's deer and elk hunting trips (as well as an occasional fishing trip) when I was growing up, I didn't take up backpacking and climbing/camping trips until I was in my late 30s - 20 years after I got out of the Navy.
Now if you'd have asked about swimming, well, I was a rescue swimmer in Navy choppers. I haven't been in a sea or an ocean
anywhere since 1972. I
did, however, manage to teach both of our daughters to swim (in swimming pools), and they're pretty good at it too.

As far as generally losing interest in guns and shooting after getting out of the Navy goes though, I don't care if I ever fire another M-60 or M-16. However, I do have and use a few .38 Special revolvers, including a Smith Model 10 (as well as a canvas shoulder holster for it) - just like the one I carried in the Navy on flights when I wasn't the designated swimmer and therefore wasn't wearing my wet gear.
BTW, the VA bought the $8,000 hearing aids I'm wearing because the Audiologists determined my hearing loss started when I was in the Navy - not from gunfire, but from sitting under two, 1,500hp jet turbine helicopter engines for nearly 2,000 hours.