Hi Angie
I will be 40 the day we arrive in Perth. I expect to be one of the youngest in the group. If you have a look at some of the other posts - age seems to be a common topic of discussion. I would say that at 57 you will fit right in, if anything you may be in the lower age bracket. When I last spoke to JY a few weeks ago, there were 13 people booked on this trip with ages ranging from 36 to 80!
I am firmly of the opinion that age really doesn't matter. I often find that it's 'the oldies' who are last to bed and misbehave the most!!!
Don't worry about travelling on your own, you will be told when and where to meet the rep and the group at the airport, and from then on will have a brilliant time.
Let us know what you decide.
Sally