If one carefully looks at the map provided here
you will notice that there are three further countries located in the Arabian Gulf and the Persian Gulf, that can be easily and safely reached by West Bound yachts: Qatar, Bahrain and Kuwait.
Although I have not in any way begun to investigate how well these countries are able to accommodate sailing yachts, nor how the highway systems from these areas are linked to Saudi Arabian highways and Aqaba, I would suggest that there are ample possibilities that can still be looked into should the Dubai to Aqaba option prove unworkable.
It would be interesting to determine whether Naber & Co. can send empty low-beds to any of these countries from Jordan and how these alternate routes from Doha, Manama or Kuwait City would potentially affect the yacht specifications as applicable from Dubai to Aqaba (max height 5.5 meters: = yacht + cradle + trailer).
Please consider this posting as a simple brainstorm, addressing possible plans B, C and D should all else fail. It should be noted that the distances to Aqaba are markedly reduced, should any of these countries become the starting points of an overland yacht transit to Jordan.
Does anyone on this forum have experience with the facilities these countries offer for sailing yachts?
Perhaps we should keep these options in mind.