We just got back from WDW and my son was in a wheelchair (brokeleg), supplied FREE from our resort. Granted we had a letter from the doctor saying he couldn't get around well. This also got us a free VIP pass that put us to the front of every line. My opinion is...if Mum has never driven a scooter, then take the wheelchair. There were FAR TOO MANY scooter drivers that couldn't manuver around which created many slow downs and messes for everyone. The wc's fold up like strollers and take up far less room.