I don't soak mine, but just long enough to loosen the dirt and slice them in halves. If they got bugs inside I may soak them overnight in salt water, but usually a good rinsing after they are sliced will dislodge any bugs and send them down the drain. Then I lay them out on paper towels to dry a little bit and store in quart sized ziploc bags until they get breaded and deep fried.
bgbuck153- I honestly believe they grow at night all in one quick spurt. I've left some on purpose and went back the next day to see if they had grown and nothing changed, they only got more dried out. I have also went back to the same spot 2 days later and found more that came up since I was there last. I have also went back and didn't find anymore the rest of the season. Go figure.
Everything has to be perfect for them to pop. Temperature, moisture content of the soil, humidity, ect.
That's why they are so sought after and many people have never even found one.
I've actually had em try and sneak off on me and practically had to run em down to keep em from gettin away!