If you and a buddy could move it half full with the fish still in there --- are they big fish?? -- then maybe that would work the best.
When I moved across town -- GOD DID I HATE THAT DAY -- I had my 55 gallon stuck in the back of my Explorer all the way drained except for about 1 inch (couldn't really get it out). I had boughten totes, taller than wide, that had secure lids that sort of had these locking tabs that flipped up over the top of the totes to keep the lids on. I think they were Rubbermaid
. Anyhow, I bought 2 of them and put half of my fish in one and half in the other. They could be good for up to and hour and a half in something like that. I had one on the floor of my car, passenger side, and one up on the passenger seat covered with towels so to not frighten the fish. I was driving at night with all of this and the totes were splashing water ALL over my car. Every bump I hit the fish went a sloshin'. It was HORRIBLE. I believe there was an entire gallon of fish water splashed all over in my car, and that is no exaggeration. I also took 10 empty water gallons and filled them all up with the tank water before draining it. This way I had a little bit of the same water in there when I set it back up.
Man it was a chore that I don't wish on anyone. Everything turned out fine.
Just to add a little funny story:
I have 3 cats and moving cats is NO fun. Cats HATE to be put into boxes or cages. Anyhow, I put my youngest cat into the car and she freaked out so bad (thinking that the windows were open mind you) that she started thrashing around the car and smacked head first into the drivers window
.......I know I shouldn't laugh, but you would have had to have been there............................good luck moving your tank!!
Silver