Since you have the voucher, I have read that they let you check in with that. Odds are your room will not be ready anyway so go to the hotel and check in first and then store your luggage at the bell station right in front. If the cm says you have to go get the ap, do it then. If not, you can go to DL and play and go to the main street bank and get your real ap and your picture taken when the line looks short. When we got ours, we went at the end of the night and there was no line but our pictures were not that great-lol. We all looked worn out!
Usually they tell you that the room will be ready around 3. Another time, we checked in at 8am and were told that we had the dtd view room on the 8th floor. I was so happy! We did not go back to the hotel around 3 though, we stayed at DL all evening and went back around 10pm to pick up the key and our room had been switched to the pool view-grrrr! So I really suggest that you call from DL around 2:30 and see if your room is ready and if not, keep checking every 1/2 hour. Last time, I did not take my cell phone and the CMs at all the stores called for me!! How nice is that! I just asked them and they did it. That time our room was ready about 4 so one of us went right over and got the keys while the rest played at DL. I was not taking any chances!
Long Beach is a great airport, tiny and easy but when you leave there, security is mean so don't fool around. I've heard stories of them even being mean to little old ladies and when my aunt (73) accidently had a lighter in her purse, they screamed at her. I still love to fly in and out of there though and love jet blue. Is that who you are flying? They have nice big leather seats and screens on each seat back-cushy! Have a wonderful trip and if things don't go exactly right, speak up for yourselves. The CMs will switch your room if you don't like it and they have other rooms available. There are a few King rooms that people complained about saying they were so tiny and they were switched. I've hear the corner rooms are the best so it does not hurt to ask for that too when checking in-lol.
Watch for signs saying DL will be really crowded-they have big black electronic billboard type signs right in front. If you see those, don't leave the park until you are done or you might not get back in. Again, have a wonderful time and don't forget your warm coats. It's cold at night.