The more time I spent planning the observatory the clearer it became to me that I still needed a rig for travelling and mobile astrophotography, mainly with widefield imaging in mind. This lead to me buying a Skywatcher StarAdventurer MINI (SAM) which did a great job hooking me on this kind of lightweight grab-and-go astrophotography. Mounted on a wooden Berlebach tripod this rig is extremely sturdy and small enough to go hiking with it (although for airplane travel I guess you would invest in a smaller carbon tripod). The more I thought about what kind of photography I would like to do with my setup the more I realised that at some point I am going to put a small telescope on a mount, and my SAM was not going to cope with that. So after some time I upgraded to the bigger brother, the Skywatcher StarAdventurer, but kept the SAM for convenience.
Beside the standard mount I attached a ball head for easy framing and bought a USB dew heater strap for the cold nights.