I'm so sorry that you are going through this. I had a mmc in July 2013. I had an early scan at the epu at 8+3 on a hunch, no bleeding or pain, I was just anxious because I was supposed to be flying to Hungary for a wedding the next day. True to my hunch, no hb was found.
I opted to have an ERPC (they don't tend to call it a d&c when a pregnancy is involved afaik) under local anaesthetic rather than general. I had to wait a week for a slot, but on the day my partner came with me and was by my side throughout, and I had the top man at UCLH carrying the procedure out. He explained what was happening throughout and was very kind. I can't fault my care whilst I was there.
I think most people chose a GA, but for me it was important to 'bear witness' to the official end of my pregnancy. It was quite uncomfortable, and I was pretty upset, but it was over fairly quickly and I got the tube home soon after.
I bleed for about another couple of weeks and in total had a fortnight from the first scan off of work (I had to tell my boss after the scan, they were very understanding).
It took me until my EDD to really get over it all emotionally and put it to bed.
Despite being 40 by then, I was very lucky and conceived about a month after what would've been my EDD, and now have a beautiful 6.5 month old daughter chatting away on my lap.
I hope it all goes ok.