"I really think it is just people not well trained thrust out into the call center but I should not have to train them."
Even experienced agents don't come across rigs like yours on a daily, weekly, or even monthly basis. You have a VERY specialized rig, and can't reasonably expect everyone, or anyone in the car/minivan/suv department to know what you're talking about, especially when you make it unnecessarily complicated.
I'm positive I could have that truck insured to your satisfaction on my Geico policy in <5 minutes using their online interface.