Suitable path for loaded touring
Hopefully, I'm not too late with this.
There IS a trail which runs from downtown Buffalo up thru the city of Tonawanda and then out thru amherst new york terminating at New and North Tonawanda Creek Roads in Pendleton. It's paved and parralels the upper niagara (some nice views of the river)till Tonawanda and then the canal out to Pendleton.
From that point I would suggest taking N. Tonawanda Creek across the canal and taking Irish road to bear Ridge and Bear Ridge (which parralels the canal )out to Lockport.
(you'll terminate at 93. Make a right then a left onto State street which will take you right into the city of lockport.)
Hope this helps.
If you need further directions e-mail me.