Choke tube questions for mossberg 535?

i have a mossberg 535 turkey 12 gauge with a thumb hole mossy oak camo pattern. I am going pheasant hunting saturday i have a modified choke and a turkey choke do i need to get another choke tube or can i use one of the ones i have? any suggestions on shells. It shoots 2 3/4, 3 and 3 1/2 inch shells.