As far as portable presses go IMO you cannot find a better one than the "Bowmender" made by our HNI member "Walks with a Gimp"

You would be well served to have one even as a permanent "bench" press for your own personal workshop.

It's the perfect compliment to todays bow geometry and produces less stress on your bow and it's limbs than actually drawing the bow.

It will easily handle up to and including th emost radical parallel limb angles.
Great press. Love mine.