I'm guessing if the family are less than forthcoming then it's hard to find out anything else about her anyway! I would still be interested to know where they were in the week before they reached Aberfeldy, why Aberfeldy, where had they planned to go next and, most intriguing, where they were before they went out to dinner that Sunday evening. Anything really to make her more 'real', if that makes sense.
Who were the family members who came over for a couple of days to support the family and is there a well known reason why Susan wasn't friends with either of her sisters on FB?
On one Susan's friends posted photos of the family that were taken at the beginning of the holiday and I wondered why those uptodate photos weren't used on her missing details - they were the most recent.
When the police are quiet I always hope it's because they're working on a hunch and waiting on intelligence reports/phone logs etc , so it suits their purpose for the case to slowly fade from people's memories while they build their case. My fear is that without a body and a good reason to request the aforementioned information, she is just seen as another woman of a 'certain age' that's probably wandered off and ended up under some shrubbery, by some stones and there's no-one making tearful appeals for action in the media that puts the police under the spotlight so we wait for discovery of the body and see what happens then. Knowing that the longer it takes to find her that, unless there are obvious signs of trauma, the harder it will be to actually establish her COD and determine whether it was natural, accident or foul play.