With our honey ales, we reuse yeast several times before starting over with a new liquid smack pack.

Somewhere someone told me you can't reuse hefewiezen yeast as it mutates- but looking online I don't find definitive results. I'm hoping to do a couple honey hefe's soon- it would be nice to reuse the yeast and save on the expenses. Any experience in do/don'ts regarding reusing hefe yeast?