How is opening a sun roof safe during a rain , I don't know , what I do know , that from our long, long ,long forum experience , it does NOT end good in most cases, as we all know it.
I will be camping in the dense woods , along the trails, that we are about to tackle on the Thanksgiving weekend . Opening a roof will not work for two reasons , most likely rain and falling leaves and debris from above.
I will probably open a rear upper hatch, partially, securing it with a fixed bracket or bungee cord for the night .It looks like two nights , the most, so nothing very long in plans.I could throw a 6x8 tarp over rear part of the LR3 creating a waterproof awning .May even bring along a small carbon monoxide detector for the piece of mind, They won't be much room for pitching a tent where we going .
As for leaving all my stuff outside, I will pack everything in my pelican cases and secure them on my PRoSpeed roof rack , let bears and coyotes have at them, see what happens .
