Mine is somewhat related. I needed to store my fish for 8 weeks while our house was remodeled. I did multiple water changes in the weeks leading up to the breakdown to get the water as pure/clean as possible. I purchased a black water trough from the hardware store and set that up with fresh live sand and then moved over rocks, and cycled it for a week before the move. Used the instant cycle. On the day of the breakdown, I used totes and several 100-120lt ice chests to move the fish (in bags, as mentioned above). Moved the fish, and acclimated them into their new home. The move landed up, taking up 12 weeks due to delays in the construction. I then did the same thing with the new tank, and moved back the same way. Zero fish and coral losses, but my 3 nems died (but they were weird right before the move, I think they liked the dirty water). I moved about 20 fish this way. When I setup my new tank, I ran into some plumbing / setup issues that took a few days to resolve, so very happy that I had the buffer of the temp home.
In your case, set up a temp home at your destination. Then on the day of the transfer, pump the water from the temp home into the new home and slide the fish over.