Sorry for your loss. 
I've had three mmcs, all three surgically managed, two were MVAs under local. I didn't require gas and air on either occasion. I won't lie, I did find the procedure uncomfortable, but it's pretty quick, and after my last one I was out doing my Christmas food shop a couple of hours later.
Neither was 'brutal'. Both consultants were incredibly kind, talked to me throughout, would stop at any point when the discomfort was too much for me, and they scan as they go. I also had my partner with me the first time, and nurses holding my hands on both occasions.
I did have an ERPC with my most recent mmc, just because it was further along and only a few months after my last MVA. Again, recovered pretty swiftly, but the total waiting around time in hospital was a ballache, we were up there for ten hours all in all, even though the operation was only about half an hour.
Hope it goes ok for you, whichever option you choose.