In the next to the last congregation I attended, witnessing at cemeteries was a big thing to do on Memorial Day. Their reasoning was that on that day, many people were tending the graves and this was the oportune time to give a resurection witness. Puke...puke! Mother's Day was another big day for this also.
I never knew of any elders to do this though, including myself.
How lovely it is to be free!
HappyDad