drowsy wharf
The Camper's "While moving, you regenerate health as if standing still" ability flat out doesn't work- when testing both with just The Camper and with other gear that boosted regeneration, my rate of regeneration is notably worse while moving - in fact, there's no difference in regeneration rate with the camper on or off when I provide Well Fed, Campfires, and Heart Lanterns myself. (This was tested with no bosses alive)
Also, The Camper's ability to provide buffs overrides any instance of the buff you had before- meaning hotswapping the camper on and off will remove your class station buffs and food buffs entirely, and while it's on any tier 2 or 3 food buffs are reduced to tier 1. (this would be very easy to fix by adding a few "if" statements in the camper's UpdateAccessory, to check if any of the buffs are already applied before applying them)
these buffs are large issues for an already questionably viable accessory (90% less damage multiplicatively already makes it pretty bad even if all buffs worked properly), making it easily the worst accessory and probably the worst item in Calamity
full hound