I just did a run of all the fields (fel and tram) and most had like 5 to 6 pumpkins or jacks on them. First off I thought the spawn was turned off but it seems like it was just slowed to a trickle. Secondly, it was three names over and over and over. No other names, just those three so what do you have to do to get your name to spawn. There must have been a few hundred pumpkins spread over the patches (some patches had a full complement of pumpkins) and I only ever saw three names. I cleaned up two of the higher spawned patches and they respawned four pumpkins between them at a super slow rate. Every single one was the same name and it was one of the three... very very strange. I collected like 5 jacks. I guess this means keep checking the patches until it is completely turned off and if anyone figures out what you have to do to get your name to spawn, please let the rest of us know 
Hunter Moon [HOT] Atlantic
Hunter Moon [HOT] Atlantic