I had the exact same concerns when I had surgery with Fielding last month!
General Anaesthetic:
I was terrified about it as well. I told the anaesthesiologist this, and he told me that he would give me premedication to "calm me down" before I was put to sleep. When he began putting in the medications, he told me that the first one would not put me to sleep, but "calm me down". However, I don't remember anything after that first medication. You won't remember a thing...and the anaesthesiolgist I had seemed very capable and he knew what he was doing.
Baggage:
I took a carry on baggage with wheels. I packed a lot of clothes (though I used barely any). The weight was well over 5 pounds. I got a lot of help - the taxi drivers would put it in the taxi for me, the hotel staff would put the bag on the table in my room, etc. Pulling it in Pearson airport as a carry on wasn't difficult. You can even check in the bag if you like. However, there were some problems with the airport + airplane. I asked for assistance with the bag at the check in, and the staff said "you're liable for your own bag", which is understandable. When I reached the security checkpoint and I told the staff that I can't lift the bag because of injury, they seemed to look a bit suspicious, but after 2 requests they lifted it for me and put it in the scanner. Afterwards, in the airplane, I told the flight attendant I was injured and I couldn't put the bag in the overhead bin, and I asked her if she could. She said "NO...its YOUR bag that you are liable for...if you're injured and you know you can't carry it, you shouldn't be taking this bag with you". And I was flying busines class! She took me to a closet on the plane (not all planes have this), and told me to lift the bag in to the closet (and she refused to put it in the closet for me). So I had to lift the bag about 10 cm and push it...fortunately it was quick and just a little pain.