If you can get in there by now (Friday), Seasons is a very nice place to dine for a 'light' Mother's Day brunch, although it is all-you-can-eat.
By 'light', I mean there are the obligatory breakfast items (eggs, bacon, sausage, biscuits, fresh fruit) but nothing too heavy, with other items such as vegetable salads, smoked salmon and I believe a small carving station. Nice dessert table, including great mini creme brulee.
Overall food quality is very good, and the dining room is beautiful. Seasons is owned by a Greek family that used to own Jasper's on Waukegan Rd in Glenview and now also owns Wildberry in Libertyville.
For something to do afterwards, right across the street are all the Long Grove shops. Not my cup o'tea, but to each his or her own.
Although The Barn of Barrington serves heavier fare, it's much darker inside, and truth be told that place is past its prime.
I'd definitely choose Seasons.