The hinge can be found pre made at Lowe's our home depot just get one that's only as wide as the board the latch can be found in the same area pretty much the same thing you'd use on a shed door.
As for the holes I don't remember the exact size but it should be somewhere in the realm of 3 to 5 or 6 inches in diameter meaning 1.5 to 3 inch half moon on each board make sure you cut them in the same spot so the half moons line up to make full moons and that the end of the board match so when you put the hinge they'll still line up.
I used a jigsaw to cut the holes then sanded it make sure to sand the sharp edges to round them of so as not to cut your victim, also you'll want to pad it I used an old sock worth some pleather over it glued to the board as far a stand goes of you want one make out either heavy our so it can slide under something, like a couch, if not it can be tied to something solid