I just came back from a night hunt.  I went back to a beach where I had been with my son in the morning and found one of his lost toys.  That was a good sign.  I walked a couple of miles patch hunting with the 15" coil on my 800.  I found penny patches and an ear lobe ring but it was pretty slow.  On my return trip I got a few quarters and one earring.  I had still enjoyed my 3 hours.  I got back to the area where we had been in the morning and took a little break.  When I resumed I walked about