You don't say what unit you have but I suspect you don't have two separate 30A AC busses in your load center. In that case, its going to be difficult to separate your hardwired A/C circuit from the rest of the circuits because they all terminate in the same load center. But maybe you do have two 30A ports and can run two cords to the pole - I can't tell. But I have only one 30A.
I've never done it with the A/C, only with a space heater because my problem is usually heating, not cooling. What I have done it to install one of these
through the side of my slide near the main power connection on the fixed wall. So far, I've not been at a campground that does not have a 30 or 50A socket for the main line and an additional 15A outlet to run to that. If you end up with that as the only option, maybe a portable A/C unit would work.
2015 Rockwood Signature UltraLite 8282WS Platinum, GY Marathon LRD, TST 507RV TPMS
2005 GMC 2500HD CCSB D/A, Curt E16, Prodigy P2, Garmin RV760LMT w/BC-20 b/u cam