You got it Larry. I use the 'disposable' sandwich boxes, Ziplock makes 'em. Put crabmeat in the box and leave room for about a 1/4" water. Freeze solid then add enough water to cover, replace the lid and 'burp' out as much air as you can and put back in the freezer. Totally prevents freezer burn.
And they stack up neatly. To thaw it out, run a little warm water over the container and then pop out the block. Put the frozen block in a mesh strainer over a bowl in the fridge to catch the water as it thaws. Hey, it ain't like fresh crabmeat, but it sure is good in January on a snowy day.