These are some places that I or friends have attended. The sites give full info
http://www.quiltingbythelake.com
http://www.fletcherfarm.org
http://www.henryfarminn.com
http://www.quiltinginvermont.stronghouseinn.com
My guild runs a retreat annually: arrive 9am Tues leave after lunch Thursday. Costs near $400. all meals provided, full kitchens in suites, private rooms w/bath in suites of 3 or 4. I went for many yrs., loved it, now way too expensive for what amounts to 2 days.
Four friends and I meet annually for a week (7 days) at my son's 2nd home. Separate bedrooms, each cooks one dinner - wonderful time, alot cheaper. Costs us each about $100 for food, wine etc. And, there are two quilt fabric shops in next town (the week costs more as a result)