Yeah. You might make two or three copies of each disc, just to be sure!
I know that you should never leave optical media in sunlight though, the UV radiation and stuff destroys the data on the discs.
I didn't trust cloud storage at first either, but I've grown to accept it
There are cloud storage solutions that provide real-time encryption so they could not read it even if they wanted to. Granted, a 1MB files is going to take 10 minutes to upload because of that, but hey, you do whatcha gotta do!
Good luck on your storage endeavors!