I'm traveling with my inspire up to Alaska. I want to use the standard case just because it so much lighter than all the goprofessional ones. I want to put the case in a dry bag to keep everything waterproof. Any ideas if this will work. The largest dry bags I can see are 115L and I'm not sure if the standard case will fit inside. I also want the dry bag just for the back straps and I don't want to carry around a goprofessional case that will weight 50lbs fully loaded.