Please take a look at Will Comet 209P/LINEAR Generate the Next Meteor Storm? figure 2 and figure 3, on page 5 of that .pdf.
This is where some people get the 2.1 Million Miles of debris field that Earth will travel through over 30 hours.
" Figure 2. The footprint of the meteoroid stream from 209P/LINEAR projected on the ecliptic.
The colour scheme labels the free space (no gravitational focusing) fluence of particles through a plane perpendicular to the stream’s arrival direction.
Locations of the Earth at particular times are labeled with arrows.
The Sun is to the upper right. "
Also, if you would take a look at page 6 at figure 4, and read or scan, from pages 4 through 6, the topics
"6 DISCUSSION" and
"7 SUMMARY" and tell me if you think that it suggest the chances of larger meteors in the tail are greater than normal.
Figure 1 on page 3 might be worth your time, and may be the image that shows more detail about the comets coma density than others.
I just wish it was larger.