I don't think you'll find anything in Joe's unless you know somebody out there. There is a park on the East side of town with a crapper but I don't think they'll let you spend the night.
Not much on that road other than crops. I know it is a bit farther out but I think you can still camp at Bonney Res. only public area I know in the area.
I have driven by the Joes park every Friday evening of Opening Weekend for 9 years (and many other weekends), and there have always been a few trailers parked there (on Opening Weekend). I particularly noticed, as there was one of the same unique manufacturer as mine. They updated the park a year, or so, ago, but there were still two trailers there last year on Opening Weekend.
Just an aside: One of the guys that goes out with me on Opening Weekend (we stay in my trailer) commented to me that I am as anxious for Opening Weekend as kids are for Christmas. True! That being the case, can I shoot just one bird on Opening Weekend Eve?
I generally see it by the liquor store..I have to say I have never seen the peacock. Turkeys in Cope, but no peacock in Joes. Lots of Eurasian doves in Joes, though. I have probably driven through Joes and Cope over 200 times in the last 12 years. Often while dark, though.