You'll have better luck further north, down here they usually don't peak until mid October. Northern New England may be in peak by that time.
Accommodations: If you're looking to walk for meals/entertainment, then Delamar in WH is very nice, and within walking distance of everything you'd need. If you're driving everywhere and just looking for cheapish accommodations there are plenty of places to pick from in East Hartford, Glastonbury, Windsor, Windsor Locks that are convenient. Where you stay really depends on how you're travelling, and what you'd like to do while here. Traffic here is nothing like DC, so I wouldn't be concerned with staying as close to the stadium as possible.
LOTS of food options:
Mexican/Spanish - bartaco, Barcelona
Seafood - Max's Oyster
Burgers - Max's Burger
Mediterranean - Zahara
Steakhouse - Fleming's
Italian - Treva, Bricco
Thai - Blue Elephant
Bars/Drinks:
Vinted (if you're into wine tasting)
The Place 2 Be
World of Beer
Elbow Room
Tailgating:
Highly recommend the parking lot on Silver Lane across from the stadium (Pratt & Whitney owned softball fields), the rules are more lax with respect to tailgating, and the walk is much shorter than the red lot (gameday/non season-pass parking). Address: 544 Silver Ln #568, East Hartford. Also try googling "tailgating at softball fields east hartford ct"