mrsu

I dont know if 10 days would be necessary, in our case it was simply because of when our interview fell, there was a holiday day before that so processing times for our medical exam took an extra 2 days and we wanted to be absolutely certain we would have our medical exams back in plenty of time. As soon as you have your interview date call the medical office because appointment times are limited to certain days and times. 
Also, I was a bit confusing, sorry. Our hotel was only 3 blocks from medical office. Then medical office was about a 15 block walk to consulate for interview. 
There was a really nice Supermarket about 6 blocks further past the medical office, it was the French partner of Superstore. We walked there and then cabbed back to hotel cause of bags. I highly recommend not bothering with a rental car.  Parking is extremely limited in downtown Montreal and everything is in walking distance and cabs are cheap and plentiful. Also you can request a flat rate for the cab ride from the airport to downtown motels. It's quite the cab ride, ours was over an hour and although I am used to city driving I was extremely thankful I didn't have to drive that stretch!!!
Also, ask ahead of time about extra costs for your medical exam. They gave us a flat cost per person when I called and I had budgeted that amount. It ended up being a LOT more. They had to give us all Hepatitis B vaccines as they are necessary for US. Had I known that ahead of time I could have hadone them done at my local health unit and paid about a tenth of the cost. Also there were extra xray charges for mine, they didn't require chest x-rays for the children but they do for adults and I had not known about that either. Our exams ended up being $1100 more than planned so I would ask when you book about any of those extra costs. Also, the staff at the medical office had very limited English. They were very nice and as helpful as they could be but communication was a bit difficult when they were trying to explain things. 
Again, you wouldn't have to stay the entire time but our flights from Calgary were rather expensive and long so it made no sense monetarily to fly back home for a couple days in between medical exam and interview. But if you had a short cheap flight it might make sense. 

So it would totally be fine to have your parents bring your things. When me and my kids were moving down my husband drove up from Nebraska with truck and horse trailer and took our things. I didn't have a lot either, sold most of my big stuff in Canada,  was just easier.  If you send your things with someone else you need to provide a letter stating that they are moving your things and it must be signed. Also, you must provide a numbered list of boxes. So when you pack your boxes just number them and put a quick description on the list of what is in them. This is how the border asked us to do it. They looked over the list, opened the trailer, picked a box and opened it to ensure the contents matched what had been written on the list. My husband was through in less than 5 minutes and we were not along.  
 
As far as waiting to move,  you will be fine. I had to finish out a work contract and could not move til end of December and our expiry date was March 1. It's just important that you get there before expiry date
 
Congratulations on getting yourself approved, I know it's a long process and I had a ton of worries through it all and there will be ongoing stuff to deal with once you are down here but honestly the toughest/longest part is over. Just get yourself moved and concentrate on your wedding.