I've been on my own for 15 years now, since my DH died and have done a lot of travelling - generally with groups. Maybe I've been very lucky, but I've always found that many if not all the other group members are happy to socialise and I have always had a great time.
I've been with Cox & Kings, Saga and Great Train Journeys and have had very good experiences with them all. My Australian trip was with GTJ - excellent
Good luck with your plans!
don't have a problem with under 16's having free bus travel,BUT
How many pair of twins have you met?
Daughter not allowed to know new baby’s name until she visits him


