I think that making a decision that is right for you is the best thing.
It is a new tool, and with that takes a bit of time to learn, and maybe more importantly in this situation, to learn to trust.
The tools will get better and more accesible. And maybe you'll even want to try them for your THIRD pregnancy! :-)
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I'm not sure whether there will be a third! 
I just started a CGMS and honestly, it's been pretty easy to pick up. My biggest concern are the sensors, which to me take some learning to figure out how to insert properly. But in just a day, you can see trends and see how fast you're rising, even within a hour. It's certainly your decision to not use a CGM, but if your insurance covers it, why wouldn't you? It just gives you more information and while you can certainly test on your own 18 times a day, the CGM will tell you where you are in between the tests.
Dexcom let me trial a Seven-Plus for a week because I was in the midst of trying to conceive. I don't know how much they advertise this (and in fact, they may be discontinuing the program), but if your doctor or CDE can get you in touch with your local rep, you can see if using the Dex for a week would be beneficial.
I trust your opinion! I think you're right that if insurance will cover it, why not at least give it a try? I can always stop using it if I find it's too overwhelming during pregnancy. So, I've gotten the paperwork for the Dexcom 7 and will see if my insurance will cover it. We'll see!