NSW Premier Gladys Berejiklian says she has been "full and frank" about her relationship with disgraced MP Daryl Maguire as she stares down a parliamentary no confidence motion she looks likely to survive.

The Shooters, Fishers and Farmers Party and the Greens are preparing to support the motion, which will be voted on on Wednesday, but the independents in the state's Legislative Assembly are rallying behind the Premier.