The only times anyone has measured is prior to getting on a ferry. When asked I go by the model number. It is 34 though the true LOA pin to bumper is just shy of 36.
CGs go by pad length. More often than not there is space behind the pad to the nearest rock or tree. Maybe there is a drop off. No matter. If necessary back the wheels right to the end of the pad. Let the 8-10'of trailer behind the wheels hang 'outback'. No real need for the stabilisers if they won't reach the ground.
We have not found a 30' max length CG that we cannot get our 34' selves into yet, & there have been hundreds in more than 1600 nights travelling.