I took my camper deadbolt apart and removed the clip that holds the inner knob on. With the clip removed the knob just slides on and off the shaft. The knob can now be removed and kept in a safe spot when I'm away from the camper in a questionable area.
If I understand camelracer's very interesting post, perhaps this YouTube clip will help. If we view from timestamps 1:35 to 2:11 we see the guy take off the back of the lockset and examine the backplate. He points to the deadbolt hole and turns the backplate over and manipulates the deadbolt lever. That lever has to be held in place on the backplate somehow and I'm guessing that's where the clip is. It's probably a circlip or some other form of a snap ring. You'd probably need a pair of snap-ring pliers to remove it and it would be removed from the inner side of the backplate (at least on this model).
The context here was preventing a thief from opening the door from the inside after breaking out the window. Unfortunately, some of us (me, for instance), don't have a lockset with a deadbolt that's key-lockable from the outside. Our deadbolts only operate if we're inside and flip the lever. However, those of us with that problem can order a relatively inexpensive replacement lock that will give us that key-lockable deadbolt.
And here's another video with a reason to go ahead and replace the single-cylinder lockset with a double-cylinder one. (The single-lock models can be opened with a commonly-available master-key). See the comments area for links to these locksets on Amazon or go to the Fastec website directly.
-OC
PS- My 01 Hawk doesn't have a key-lockable deadbolt. Do newer model FWCs and/or ATC campers have them?