Bullet has been bitten--what am I missing

OK, so I bit the bullet and pulled out the ol' AmEx and picked up the Celestron CGEM 800 HD. Which gives me a nice tracking mount and gives the wifey a telescope she can use for stargazing.

Beyond this, I have (or have ordered):

• T-adaptor
  
• T-mount adaptor for my 7D
  
• Nebulosity 2 (I am a Mac household)
  
• StarMap (star finder app for iPhone/iPad)
  

• What are the bits I need to mount my 7D on the mount - I think a dovetail bar and something like a Manfotto head?
  
• When do I need to worry about autoguiding--I figure it will take me a while to figure this rig out. I am starting with wide field pics--its auto guiding only make sense with DSOs or is it helpful even with wide field pics?
  

The T-adapter is what you use for mounting your camera on the telescope. If you want to put the camera directly on the mount you will need a dovetail bar and something to put your camera on the dovetail, for which there are many possibilities.

Cool--thanks--ended up getting both.