INDIANAPOLIS, Ind., - Single-Day Tickets for the nation's most important wrestling event - the U.S. Olympic Team Trials - Wrestling - go on sale Saturday, May 1 at 11 a.m. Eastern time through Ticketmaster. The 2004 U.S. Olympic Team Trials - Wrestling will take place May 21-23 at the RCA Dome in Indianapolis.     Tickets will be available at all Ticketmaster outlets, charge-by-phone (317-239-5151 in Central Indiana), online at www.ticketmaster.com or at the RCA Dome box office.    Single-Day tickets are good for both sessions on that day, and are $12 or $25 for May 21 and 22, and $20 or $35 for May 23.      Two All-Session ticket packages remain available through Ticketmaster, including a limited amount of Gold Medal Club All-Session ticket packages for $150. The Gold Medal Club All-Session ticket features reserved seating, access to the Gold Medal Club Lounge, a souvenir program, a commemorative gift, autograph signings with former Olympic athletes, an opportunity to meet the Olympic Team and free parking. The Silver Level All-Session ticket package is $80 in general admission seating.     For hotel reservations, fans should contact the Wrestling Housing Bureau at 1-800-556-INDY (4639) or housing@indianapolis.org to reserve hotel rooms.     Ticket purchasers will be entered in a drawing to receive tickets to watch the USA take on the World at the Olympics in Athens. The winner will be announced at the Olympic Trials in Indianapolis in May. The individual, whose name is drawn, must be present at the U.S. Olympic Team Trials to win.