Lifting a GoPro

Burg

Never catch a multirotor
AND ALSO- Will I be able to fly the Naza system with my Spektrum DX6i?

Yes, but then it will be very difficult to install the add-on GPS.
You will be limited in the use off all Naza+GPS functionalities.
I know some have managed to get it all working with the Dx6i (RCGroups).
But not without a lot of sweat and tears.

I had the DX6i but changed to the MX-16 HOTT for this purpose.
I also wanted to remotely adjust the Naza gains and have camera pan/tilt at the same time.