Location of PANSTARRS 2012k1
on 31 May 2014 relative to Ursa Major.
In this photo, PANSTARRS is in the smaller circle:
My experience suggests that if I can capture a comet in a wide-field photo, I can see it in a medium sized telescopes and possibly in binoculars. However, dark observing conditions will be necessary.
Using the Heavens Above website, I created a map showing where to expect the comet on the weekends of June 21 and June 28:
UPDATE: I labeled the magnitudes of stars for estimating brightness. PANSTARRS is dimmer but more diffuse than a nearby 9th magnitude star.