Dad is in his mid seventies, still very fit and active and enjoys hillwalking. He's quite reserved, and since Mum died 3 years ago he's found holidaying quite lonely. Money is no object, and he's been on some amazing holidays - but finds wandering about and eating on his own every day quite lonely (he lives alone some distance away from both DSis and I, and doesn't have any friends really, so it's not a change for him).
For the first time ever he's open to the idea of a singles holiday - but it must be a smallish group, not 'party, party', should involve hillwalking/sightseeing, and the group should be of a similar age as him.
Anyone got any ideas of companies etc he could use?