Lawrence,
The OC plans does not contains that much detail but it does have the aft cabins layout for the lower deck: nothing for the front area stores (if any) and nothing for the main deck, which I am confident, would have been fitted with a wardroom as well as officers quarters, etc..... even as a privateer.
If I may make a suggestion, it would be wise to follow the info available on the plan and find other documentation for what is not shown. As far as the actual building of the lower cabins' bulkheads / walls for the aft section, I would use what you have found elsewhere as it pertains to the structure (wood boards, etc..) but the layout should remain as per the plan. Other rooms' layout on the main deck would be something to look into from US ships built at the time period and adapt the findings to the available space, the use and the size of the ship.
Furthermore, when working from 2 sets of plans, one being from another ship, although it may be the same class, my priority would be the plans of the ship I am working on, then extract other info from the second set but within certain parameters. If the 2nd set (plan) was from the same ship, but let say, after a later documented refit or a capture of the vessel by a different entity, then you would have to make a choice as to which version you would want to represent. Some info applies to different ships of the same rate / class, although I do understand that a vessel such as the OC may not have been built according to formal Navy Establishments due to its status. And I do not know enough of US building regulations anyways.
This is just my way of looking at this.......
GK
