When I moved my 75g, I found the following helpful:
I had made an extra batch of new SW at correct salinity and temp to have on hand, double what I thought I needed. I used every bit of it.
I set up 3 bins with fresh SW and small powerheads and heated them the day before. Saved time that day.
I took the opportunity to shake and rinse off the live rock as it came out of the tank. So I used one of the 3 bins for that.
The other 2 bins I used for livestock and the liverock after cleaning.
I put an ammonia badge in the new setup to monitor for ammonia, in case it went up after disturbing the sandbed. And I had something like "Prime" (not sure what it's called in Canada) on hand to neutralize the ammonia if it appeared. I also added a Poly-Filter to the sump for a couple of days, just in case.
Keep in mind that things take a lot longer than you think it will. But it all works out.
Good luck.....