Nice work Derek. Great find having some nice foreground so close.
Do you need the 6D and 14mm on a tracker? Going by the old rule of 600/500 you should be able to have about 42/35 second exposures without much star trailing. I've recently aquired the same equiptment and was taking 25 second shots at ISO 6400 and if you use some noise reduction (I was using Lightrooms inbuilt NR) you get very nice shots I have a couple of examples in my post on this forum
here or in
this post I have some straight of of camera shots inc 30 seconds untracked @ ISO 6400.
The toughest thing I've found with that combo of equiptment is getting the focus on the stars sharp, even on with the live view 10x zoom it can be tough.