seeing how the wood's in maine are about the same as those here in ny just about any pattern will do(not water fowl ie... corn stalk marsh weed pattern)

some folks tend to go with a summer pattern(those used by early season archers) which have more green leaf pattern's than your typical late season(brown,black,and orange) fall patterns.
you are going in the right direction in asking the guide... also will you be hunting from a ground blind... elevated tree stand... or a fully enclosed blind? these would also dictate as to how(pattern) you will dress. also at that time of year how far along is the leaf change? just a thought and my opinion.