Good luck with that one...
Personally, I don't touch LTL reefer - LTL frozen is ok as all the product in the trailer is frozen
But reefer, the risks are too high to take a chance. We never know what temperature the other freight in the trailer needs to be keeped, and the freight risks to be keeped at too high or too low temperature as they usually don't have split trailer...
Sorry I couldn't help!