mjacobson@tahoedailytribune.com Residents and business owners of the Lake Tahoe Basin are preparing for Mother’s Day on Sunday, May 9, after missing out on activities last year due to COVID-19, although florists were able to reopen just in time for that weekend. Restaurants are opening their doors to patrons, offering bountiful brunches and quality family time. On the South Shore, Riva Grill will be hosting their Mother’s Day Brunch from 10 a.m. to 2 p.m. Reservations filled up quickly after the restaurant released their a la carte menu, featuring meals such as a seafood platter or biscuits and gravy.