Hi Thud
I have run several no-historical Okinawa campaigns with my squad and with/versus others squads.
I tell you how these campaigns were planned and if you like it and want use some idea of it then ok.
Basically there were 2 land airbases in Ie Shima and Naha ( one for each army ), and the target is conquer the unoccuped airbase of AM6 and maintain it by several turns.
Also there were 2 CV TF with 2 CV and 5-6 destroyers and 2 transport TFs with transport ships and destoyers as escort in each army.
The supplies are in the begining in the AC6 and AT14 islands, and the task of the transports is load the supplies ( guns, tanks...etc ) and bring it to the main island, the North part of the main island is forbidden for landing troops and the target base ( M6) only can be occuped by forces transported from the supply islands, not from the land airbases.
The TFs cant get close to the enemy supply islands neither enemy bases ( the ships artillery destroy anything ) and the recon plane cant fly near the supply bases... etc.
Of couse attacks on the TFs and the land Airbases are habitual.
Then the quid is protect the transports , the transports mission is load the supplies and unload it in the main island in order to conquer the target base.
There is an old version of this campaign for unload in the SEOW main page, if you want a newer one ill send you and feel free to modify it.
S!
Ala13_Nachote