Hello I did some testing against Galvs Tool Plugin and Simple Crops plugin and the seem to work together. I did some testing with saving the game and loading the save which seemed to work as well. Crops I planted were still at their proper stage after reloading the save.
My crop events were spawned onto the map using the spawner as saved events and continued to work as they should. This was using the Ritter_EventSpawner SavedEvent Fix Testing.zip version of the plugin.
If you're going to unspawn the events after crops are harvested you'll want to be sure to erase the saved event data.
I didn't get around to testing against those ABS plugins yet but I'd be surprised if they weren't compatible with each other.