relocating ferals to good home but they are avoiding trap.

I am supposed to move in two weeks. With the help of Humane Society I am relocating a family of feral cats I have been caring for for a year. They have all been TNRd and they are going to a good sheltered environment where they will be mousers and also cared for on property with sheep and goats. Much better weather and no snow! Two of them have been relocated so far and there are four left. They are definitely avoiding the trap I have set for 3 mornings in a row. I'm running out of time money and ideas. Will a drop trap work better? Any recommendations?