I got checked last night at Squantz Pond and I have multiple copies scattered around in my hunting back pack, car, boats, fishing bags and one in my back tag. She seemed happy to see any of them as long as she could read the detail.
Using the online system and being able to make multiple copies saves my butt because with only one license I was always forgetting it when both hunting and fishing were on. It was always in the wrong bag. Now there is always one in my wallet. Wallet size would be nice, I have to figure out the reducing buttons on my printer/copier.