I've been wanting to brew a barley wine for a while. Like most, I don't want to have a large carboy taken up for the length of time that one would need. So I'm alright with just doing a one gallon batch. With my mash tun set up it would just be pointless to do that small of a mash. I have a 10-gallon rubbermaid cooler tun (the fat cylindrical one) which i feel keeps about a gallon in the dead space below the spigot. I read somewhere on the forums about doing a large mash and collecting the first runnings for a barley wine and then the second runnings for a smaller beer. Does anyone have any experience doing this that could tell me what I should be doing to make sure that I get a decent gravity for the BW? Maybe anything that I should consider when calculating the grain bill? If I'm going to do a beer that's gonna take around a year to finish then I want to make sure its done right and that I actually yield one gallon at a decent at the right gravity by the end of the boil. Sorry if this is broad, any suggestions appreciated.