Is there a method to recover camphene from sublimation at ambient conditions?
MIT has a brilliant technique for sublimating and condensing:

https://www.youtube.com/watch?v=dBNELFi5XiY

The sample is placed in a culture dish sitting on a hotplate. The lid is placed on top.  Finally a beaker with ice is placed on top of the dish to condense the sublimate. After a while crystals form on the top of the lid. These pure crystals are periodically scraped with a policeman and collected.