I take it that you, like me, are in the northern tier states or Canada? Guessing from your statement that you're a month away from bean planting.
I don't think there's any set answer to your question. For me in east central MN, it comes down to when is it dry enough for my equipment.
The one caution that comes to mind is if you happen to be in an area that had a dry winter so that you are already low on soil moisture, I would not want to turn dirt any earlier than necessary. The more you till, the more moisture you're going to lose from the topsoil and the longer that the soil stays "open" without being planted and compacted, the more moisture you continue to lose.
But if you're in an area with enough moisture, I can't see much of a downside to getting in there when you have time. We food plotters have to do a lot of things when we have time as opposed to waiting around for "better" conditions, times, etc. Many times I've had to work when it's too hot, too dry, too wet, too windy, etc, but unless you live on the property and have endless time, you can't always wait for the right conditions.
Grouse