I was wondering if it would be a good idea to make one big pile containing the whole bag or if you could succesfully mix a few little piles.. Has anyone tried mixing half the bag with 3-4 gallons of water and had good results? any input appreciated

Me and my buddy split a bag of it and we had two nice size holes a few weeks later. I would say you can use it for multiple spots.

I have split a bag up like you were saying but it to "freshen" up a couple of spots already established. The bad news is that if you're just putting it out it is probably too late in the year to see it used much. I've done the same thing and didn't see it used until the next summer when scouting. When the fawns are weened and the antlers stop growing then they generally visit these sites alot less. And sometimes I think that stuff is so strong that it needs to soak in or dilute somewhat before it becomes attractive to them. Put it out but I would'nt expect too much until next spring. Just my experience, good luck.
I also want to say that I only use these spots to get alot of pics during the summer, I don't hunt over them.

You can slit the bag easily. I split a bag with my uncle, then later we slit a jug of the liquid to frshen the hole, and both are very good holes.

I use one bag to start the site then 1/2 to freshen every 2 months. Try the Black Magic formula of Deer Cocaine. It's awesome!

thanks