Hardwiring - Fuse that is Always On?

I was wondering if any of the fuses are always on, so I can hardwire my dashcam to my 2011 E92 335i.



I've heard stories of how BMWs put everything to sleep mode after 30minutes or so of being turned off. Is that true?



If nothing else works, I think I may have to wire it directly to the battery, which is a lot more troublesome for me.



Any input is appreciated. Thanks.