Hey, I'm just finishing a veeeery long mission (more than a dozen game sessions) which just a setting like that (players on a diplomatic mission visiting the planet).
Apart from the reception and diplomatic pleasantries, here's what the locals offered :
- Visit of the capital and its most famous areas and monument
- Visit of the greatest museums of the planet
- Visit of a well known archeological site (think Egypt)
- Attendance to a typical show or sport event (for instance, on my planet the locals were very skilled at holography, so the players were invited to a holographic show)
- Visit of leisure facilities (beach, ski, etc - depending on the climate)
- Visit of some factories, hospitals and universities (for instance the exobiology class)
If some of these ideas are to your liking, I can offer a few exotic ideas I came up with if you are interested.
Hope this helps
"The main difference between Trekkies and Manchester United fans is that Trekkies never trashed a train carriage. So why are the Trekkies the social outcasts?"
Terry Pratchett