Not exactly sure what the defaults are but Q and E should be lean. Space gets you over obstacles. I think CTRL or L SHIFT are your run, the other is crouch. F is use item. Z is prone?
I don't know about camera controls because it is first person only unless you are spectating.
I set em up to be as close to my ARMA settings as I could, but very few games are as flexible as ARMA when it comes to key binding.
For instance I use ALT for sprint, F for crouch and C for prone, V for weapon mode, CTRL, Z and X for the various comms, a mouse button for use item, and another for map.
A couple things I recommend:
Bind one of your "extra" mouse buttons (if you have more than 3) to the Map. You will be using the map a LOT.
If you already have Voice Attack, make a HLL profile and set it up to toggle holding down your run key, either on voice command or using another key as there is no "auto-run" setting in HLL but you will wish there was. If you don't already have Voice Attack, I would think about getting it. It's cheap and works with most games and I find it handy for any number of things. There are free programs that do more or less the same thing, and I tried several of them before finally deciding to go ahead and buy Voice Attack because it just works.