Like nativetexan I baste in sections. I have a cutting table and it is only about 36 in wide so I clip the quilt around the middle part first, pin then move it to the edges, clip and pin each side. It has always worked for me.
The plastic clips are the right size for the table and I also use the big black clips that you can get at the dollar store.
I use the bent pins also. Twin size is the biggest I have done, mostly only lap size. I send out my larger quilts for quilting by a longarmer.