We are in the same boat...kind of.
Our insurance would pay - in theory - for the GA related hospital costs (not for the dentist, but for the GA), BUT:
We have a 10,000$ deductible, of which we had met 0 $ before the surgery. So that means, they won't pay after all.
If it helps, I can give you an overview of our costs:
Dentist's estimate BEFORE the surgery 2800$ (that's what I had to pay before he'd do the procedure)
Hospital estimate 6000$ (surgery was last Friday, so I haven't received the final bill yet)
Dentist 2nd bill AFTER the surgery 1300$ (he said he did a bunch of xrays and there were more fillings than anticipated
And there'll be a bill from the anesthesiologist at the hospital.
We are asking the hospital to put us on a payment plan, paid the first dentist bill with a credit card and are currently trying to figure out how to pay the second
There's a health care credit card from GE, called Care Credit, that often doesn't charge interest when you pay the amount off within the agreed upon timeframe (usually 12 months for amounts over 1000$). You might want to look into that and ask whether your dentist accepts it. Just make sure you pay it off before the promotional period expires, because they'll charge interest (a lot, like 20some %) retroactively if you don't.
Also go back and double check your medical insurance regulations....we do not have dental coverage, but our insurance would cover GA for dental procedures if the child is under 7 years (provided the deductible had been met). Maybe you have a clause like that as well?
As you can see we opted for the GA as well. I didn't feel comfortable with the conscious sedation option, either. And from what you describe, your DD would probably have a hard time with it.
If you can manage the payment at all, I would definitely choose GA.