ZFS Best way to backup and mount an a zfs FDE media

What is the best way to backup an encrypted zfs filesystem so that one can mount it with the GELI password via a FreeBSD live USB?

I could clonezilla/rescuezilla or dd/dc3dd the partition but that involves extra steps to mount them when it is to be read in the future. I am trying to learn a better alternative using zfs itself. Is it possible for me to have /root and /etc encrypted as a zfs file which I can mount later anywhere with a password?.

Code:
zroot/ROOT/default    206G    202G    4.1G    98%    / [/code

Thanks.
 
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