Been doing this for 36+ years.
I-90. Don't exit at 219, go past and get off at Milestrip. Then diverge based on where you park. For example, I park at a woman's house across from ECC on Southwestern. I turn into Home Depot Plaza, then cut behind the next plaza toward Wegmans. Get onto McKinley, then left on Brompton and left on Southwestern.
If you're at Lot 1, you could go all the way down McKinley then cut over to Big Tree. Depending on how early you get there, traffic will affect travel time.