I would not worry about a decoction unless you are doing a bock, dopple bock or bhemian pilsner using undermodified malt. A single infusion will be just fine.
Brewing since 1989 - BJCP National Rank
Member of KROC and Foam on the Range
Fermenting: Imperial IPA, Belgian Blonde
Conditioning: Dortmunder Export, English Barleywine
On tap: CAP, Steam Beer, ESB, Honey Doppel Mai-Bock
Newly Bottled:Belgian Tripel, Belgian Easter Ale, Summer Saison