We were there in July, for DL they had 2 entrances open to get into Downtown Disney, most people stopped to go through the first entrance and the line was backed up...we kept walking further down the walkway and went in the second entrance (only 3 people were in front of us walking down there and its a little closer to DL) and we were through in no time at all. Everyone can scan into the park, whether a resort guest or not when they initially open, and then they will hold non resorts guests in the hub. There is technically nothing stopping someone from bringing a friend in with them, assuming they had space on their room (I.E. we had a 2-bedroom villa and 7 people on our room. One morning only 5 of us went for early entry, so in theory, there would have been nothing to stop us from bringing in 2 other people as they scan 1 room key for each party. I usually went first, told them the number in my party, they scanned my card to verify we had at least that many people in our room and then let us through).