They are more effective in rural areas than in urban areas. The Jule Miller Film Strips are a great help in teaching.
Tent meetings take a lot of physical work and a lot of looking after details.
It is not a one-man job. Brethren accompanying David are very helpful. Each meeting is different. You have to take things as you find them. The home classes and other calls made during the day are an essential part of a tent meeting's success.