I'd
REALLY call them about baggage!!
Many operators of smaller aircraft have quite restricted allowances... in my skydiving days we used to say of the 206 (little brother to the 210) that "If you could close the door it would take off".. but I doubt any rational operator would load the way a drop zone does!!!
OT - I notice McCall also operate BN Islanders..... that brings back memories to me!!! ^