Document Storage

How and where do you guys keep your registration and insurance papers?

I picked up a Quad Boss Tank Bag and while the compartments are nice it’s always getting in the way (bumping throttle at full right lock…). We have a couple different tubs/racks so there just isn’t "one place" we have to keep the important docs that need to go with the bike. I’ve thought about the rear storage under the rear rack but that’s full of straps, hitch, wrenches so that won’t work. I’ve even considered under the seat but looking for input.