Moving a 4 node cluster in two pairs?

Guys,
We're getting ready to move our 4 node FAS8060 cluster to a new data
center.  As part of our due diligence, we're thinking that we would
snapmirror the most critical business volumes between the two pairs.

The idea would be that if the truck holding pair A+B doesn't make it
for some reason, we can still bring up the cluster with nodes C+D and
still have those snapmirrored volumes available to continue working.

So my questions are:

1. Can I boot a cluster with half the nodes missing?  I'm sure I
   can...

2. Has anyone else had to do this half assed method of shipping DR?

Cheers,
John