I did a project like this about a year ago. Around 330-400 square feet. It was right up next to our house, an outbuilding, and an old well. Quite complex as far as layout. I'll get some pics up tonight.
I chose a totally random pattern. I layed as I went. Big stones went in towards the central "sitting" areas. It is back breaking work. I had all the materials, graded and leveled the area, and started laying. I got one "row" down, and the SO called in professionals for estimates. I was working too slow, and she saw how hard it was on me.
Well the price for laying it was crazy! So I did it myself. I tore up the row, and just went random again. Square feet is, square feet! If your in a square or rectangle, it ain't gonna matter.
One issue I had, is since I had varients, the size did not matter, the thickness DID. Each stone had to be hand dug next to where the others laid. I had some that varied between 2" and 3 1/2" thickness. This caused me to spend a lot of time "laying" each stone.
Crushed blue stone packs well and hard when you run your tractor over it.
I went back to the store for a 12X12 and another piece at the end. There is a god, because I had nothing left over. No cuts, except for around my hand-pump well.
I used a hand scrapper garden tool, to bust up the blue stone for stone laying. I used a rubber mallot to pound each stone down. A 2X4X12 was used as a level to keep me honest.
Like I said, I'll get some pics uploaded later.