When you really want to get noticed at an exhibition or event, choose a huge concave fabric display stand like this one.
A large panoramic image looks great on these, and they have that extra impact thanks to the unusual concave slope.
This one comes with three stabilising legs which protrude from the reverse of the frame to ensure its stable. There's still plenty of room on the back though, if you wanted to pop your log or another message on there too.