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ATX85
Look up Brandon glass from team hookup and gone catching with Cameron black. Both are highly revered guides. Scheduling may be an issue. So sooner the better on booking the trip.
As far as trout. Look up central Oregon trout fishing. It is chocked full of amazing lakes close together.
First two that comes to mind are diamond lake and east lake.
Both have large trout in the 14"-20"+ range.
Around Portland is hagg lake. This is my goto lake when the weather cools.
Many holdovers in the 12"-20"+ range.
Plus u being from Texas you may be interested to know hagg has a very healthy small mouth population and put out the Oregon record.
Good luck! Please tell us how u did!
Make sure you let us know how you end up doing.