This result helped Wanderers claw themselves away from the bottom of the FA Premier Reserve League table, and asked a few questions about Tommy Craig's side.
Hill struck a rather scrappy opener on 50 minutes when firing past goalkeeper Tony Caig from close range.
On 78 minutes pacy striker Smith beat Magpies defender Liam Atkin to the ball to find the net from just inside the area, and this was quickly followed by a Wanderers third some sixty seconds later as the young Connecticut-born flier Smith made good use of a calculated midfield pass by Dale Whitehead to beat Caig once more.
BOLTON: Ali Al Habsi, Brad Hill, Scott Jamieson, Matt Cassidy, Mark Ellis, Jeroslaw Fojut, Leslie Thompson, Dale Whitehead, Johann Smith (Blazey Augustine), Bedi Buval, Danny Stott
Subs Not Used:Mark Charlesworth, Przemyslaw Kazimerczak, Michael Roddy, Rhys Powell
NEWCASTLE UTD: Tony Caig, Chris Shanks, Chris Farman, Liam Atkin, David Edgar, Kris Gate, Martin Brittain, Daryl Smylie, Carl Finnigan, Matty Pattison, Alan O'Brien
Subs Not Used: Mickey Terrell, Mark Cook, Craig Baxter, Glenn Reay