Do we want to relax the unvisited rule?
I think we should. There are also plenty of serial sites where visited may still allow for a new location and angle to be explored. Sticking to my hometurf Hamburg, we could get a private tour of the Chile house including the interiors. We could have dinner in the Speicherstadt. We could do a Wattwanderung to Neuwerk. So, these would be visited sites, but with a new angle.
Should we maybe aim at Top Missing (sites that should be WHS, but aren`t)?
This only makes sense when we have a revised list of top missing. But then I think it would make sense to actually trust our known judgement and get to take a look on our own.
Do we still aim for a special group experience?
If possible, yes. But frankly, we are all very individual travelers, so I think we shouldn`t force this.
If so, what sites would actually count here?
All the caves you don`t get entry to. Residential buildings without museum.
Should we focus on quality or quantity?
Quality. The meet up needs a highlight site (above 3.5, preferably above 4). Quantity I can do on my own.
Should we stick to Europe?
Yes. I think arranging long distance will just create head aches for everyone. We are primarily Europeans and till the Americans/Asians/African community members don`t make the point more strongly that we should come their way, I don't think it makes sense.
Should the site be easy to reach (weekend trip)?
Yes. Even in the highly optimiyed fashion Els traveled it was a 4 day adventure for a single site. For me, it was not possible to get there in less 5 days and that's just too much for a single site.
Should we try to find a location with a local guide?
What location could you be a guide for?
Should we focus on an area with independent options for travels?
Yes. For me those areas would be: Northern Spain, Greece (Pelepones, Isles), Turkey outside Istanbul, Romania, Russia, Tunisia, Southern France.
What period should we aim for for 2020?
I hate having to prebook. And I hate insane hotel prices. It shouldn't be high season. May/June or September.