The term 'all bases covered' is a phrase that means all aspects of a situation have been taken into account and PREPARED for. The crossword solutions for this phrase are 'PREPARED' (8 letters) and 'BAGS' (4 letters). PREPARED in this context means to be ready for something, while BAGS could refer to having all the necessary items packed and ready to go. Together, these two words suggest that all aspects of a situation have been taken into account and everything is ready to go.