I would say don't risk it if you want to to live.
I would say nearly impossible but i have seen it done
You can drop your trailer at the visitor center in Cave Junction (at your own risk of course) it's where you have to purchase tour tickets this year. Illinois valley visitor center 201 Caves Hwy. Cave Junction, OR 97523. As mentioned in the other answer, trailer travel is not recommended to the caves.
Not super convenient. There are miles of windy mountain roads, and the signs recommend no trailers.
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