If the ground is very moist (you said it rained yesterday), and it's still raining but not pouring, it's a border line call. The times that I have hunted, with conditions like you are reporting, I defiantly found more than I would in drought conditions. The flip side is that if the ground is not dry enough to be a bit crumbly, you and all your gear will be covered in mud and muck.

A couple of weeks ago my wife and I were hunting a site and it started to drizzle (it had rained steadily the day before) the ground was moist but you still felt like you were digging dirt, but after about a 30-45 minutes of drizzle the ground turned to mud. We pushed on and after 2 hours we were covered in mud, shoes were caked, legs and arms streaked with muck. Fortunately, I had towels in the truck, we used them to wipe ourselves a little and to throw over our seats for the ride home (Towlie says "Don't forget to bring a towel!"

). The clean up consisted of cleaning boots, clothes had to be hosed down then put into the washer, our finds were caked more than usual, the truck seats, floor mats, and pedals had to be wiped down, and our detectors had to be cleaned up. The mud had also plugged up the speaker port on my Garrett Pro Pointer and it has not sounded right since.
So, yes it can be done, but unless I knew that the site was going to be plowed under the next day, and I was sure it had great finds waiting for me to unearth, I would give the ground at least 24 hours to dry out, IMHO.
