Luke Ridnour scored 20 points for the Minnesota, which had a chance to take the lead in the final 30 seconds when it trailed 95-94.
Smith scored from the edge of the box and Luke Joyce netted from 20 yards before Smith's third from close range.
Among the 14 new arrivals at Kingston Park this summer were Andy Henderson, a Scotland Test cap from Montauban, Munster fly-half Jeremy Manning and England under-20 centre Luke Eves, brought in from Bristol.
At last year's event, no player ranked in the world top 20, apart from Luke Donald, finished within seven strokes of the winner, Matt Kuchar.
Luke McAlister converted to make it 20-7 at the interval, but that was as good as it good for the invitational side, captained by Wallaby flanker Phil Waugh.
Montrezl Harrell led Louisville with 20 points while Russ Smith and Luke Hancock both had 10 points.
Montrezl Harrell led Louisville with 20 points, while Russ Smith and Luke Hancock both had 10.
Freshman Montrezl Harrell led Louisville with a season-high 20 points, and Russ Smith and Luke Hancock both had 10 points.
Tony Clubb added another try, Luke Gale adding a third conversion before his penalty earned a 20-0 half-time lead.
But Mark Foster and Luke Narraway went over to take the English side into a 20-5 lead after a scrappy first half.
But when Luke Arscott sliced over from close-range, Bristol took a healthy 20-13 lead, though Barnes, on for the injured Strange, missed an easy conversion.
After being shocked by Luke Robinson's early try, Warrington ran in four tries to lead 20-10 at half time.
Luke Walker, 25, from Brierley Hill, West Midlands, denies killing Chelsea Hyndman, 20, from Castleford, West Yorkshire, in May 2010.
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