Pro hockey...lens advice??

Hi!

I am lucky to have great seats for an upcoming pro hockey game. I have the 20D, and unfortunately I am unable (per arena rules) to bring a lens greater than 3 1/2" long. Currently the only lenses I have that fit this description are the kit lens (18 - 55?) and my 50mm 1.8 lens.

Should I just tinker w/ the kit lens, or would purchasing an 85mm or 100mm prime be a big help? (I am just thinking having any sort of zoom would be nice, in case action is right in front of me...I will be somewhere b/t blue line & goal.) I was thinking of the primes mainly for the speed.

Thanks in advance & off to keep reading the other threads w/ advice!

ETA: mods, if this belongs in another forum, please move. I realized this is a photo sharing thread! Sorry!

100 f2 -- 2.9"

and a tamron or kenko 1.4x tc (the canon and sigma TC won't fit)

Thank you!!

Or Canon 85 f1.8 if you can get close to the plexi

scott wiggins wrote in post #2529001
Or Canon 85 f1.8 if you can get close to the plexi

I think I am leaning towards this lens...need to make up my mind soon though if I want to get it in time for the game.