temporarily import a zpool striped disk (root-on-zfs)

Hi,

I want to *temporarily* import a disk into a stable/13 system 
in order to modify a couple of files.

The disk is an external usb3-boot root-on-zfs -current in a stripe 
configuration. The machine I'd like to import this into is *not*
zfs-on-root. It boots to ufs, uses zfs for data, runs stable/13

Ideally the disk should be mounted on /mnt of the importing system.

Is there an easy way to do this that does not disrupt either system?
I'm wary of using zpool import in case the importing pool pollutes
the cache of the host.

thanks,
-- 
J.