My suggestion is to make them as 'blocks' and not long rows. When you come to piecing the 'blocks' together it will be shorter seams to deal with and not a looog one. You can make each 'block' as big as you want, then just assemble the blocks. That way your mind is not seeing long rows, only a stack of blocks.
Love what you have done so far and it will be a great memory quilt.