your options are IMO< buy some better metal boxes and lock, and HOPE they don;t get stolen,(I have had them stolen in metal boxes before)
or maybe get a better camera with better IR
another disadvantage of hanging a camera HIGH is, you also have a less detection area!
but some times I do hang mine high to prevent thief(15 ft up at times or more)
but I prefer to run them lower due to better detection and better pic's I get
IMO< the cuddle back, metal boxes that ALSO protect the LOCKS that can be lag bolted and cable locked to a tree are the hardest for folks to steal
but they might not be legal to use in some places where its Illegal to bolt them to tree's
but after having about 30 cams stolen, these have been the only one's that have NOT been taken
I have had one smashed and one shot however?(all on private POSTED lands too)
lots of jerks out there that have zero respect for others property
sad, as most cams that get stolen IMO are by fellow hunters, sucks but its the poor ways of the world today!