We have a line, but you don't have to stand there the whole time. Think if it as more like a que.
We show our quilts front and center where the microphone is. The historian takes a picture of each quilt. She doesn't have to move around much this way.
Awhile back people were called by name from the show and tell registration sheet. That took much more time, as each person had to get up from where they were sitting.
I think each guild finds a way that works for them.