My solution is a big Rimova (curtesy from Lufthansa for frequent flying)
Lots of space, very light but stable. When heavy rain I use the tonnau for rain protecting the zippers.

Attached Images
image.jpeg (296.07 KB, 363 downloads)
Hannes
once: Green M3W; 2013
now: Red 4/4 Sport; 2011
and some practical cars for use in real life