Like several others, I keep all my paperwork in my wallet.
If you have to open a bag or trunk to get the paperwork, it gives the LEOs a chance to search it. They now have probable cause "for their safety".
Always remember, they do not have a legal right to search your bike unless you give them permission, or they have a probable cause. All you have to do is tell them that you do not give permission for them to open any compartment on your motorcycle.
They can force the issue if they want, but you will then have legal grounds for a lawsuit. Most don't want that. They can always detain you while they obtain a search warrant if they want, but again, most do not want to go through that hassle if they don't have to.
Don't be a Dick, but know your rights.