These concerts are not like the candlelight processional where on the really busy days you might not get in to the next show in the standby line.Pretty much if you get there 20-30 minutes before each show you will get a seat,the dining plan is basically there to guarantee you a seat up closer if you dont show up early enough.Basically if the show starts at 6:45 and you show up 5-10 minutes before without a dining plan the best seat you might find could be towards a back corner,Billy Ocean is popular but not as popular as groups like Boyz II Men or Air Supply who really pack every show and require getting there earlier.