Panel 1: As John and his group drive to Ottawa, he tells them that he doesn't know about them he's been looking forward to this trip because it's good to get away from the clinic every so often.
Panel 2: Doctor Shotgun agrees because one tends to stagnate cooped up like they've been. They need get out, see what's happening, take in the action, shake off the cobwebs and interlard their daily speech with platitudes.
Panel 3: Doctor Backseat says that the workshop on temporomandibular joint dysfunction looks interesting. John and Dr Shotgun agree.
Panel 4: We switch to an exterior view of the hoverwagon as John says that they should remember to actually attend it.
Summary: John's thinking that this is some sort of vacation ends up costing him. First off, he's not prepared for the fact that what looks like a nation-wide event is going to result in overbooked hotels and second, he was so distracted, he forgot to book a room.