http://www.millermotorsportspark.com/track_faq.php

We just reserved our RV spot, we'll be leaving Wednesday morning to get there Thursday morning, and staying all the way through Sunday night.

This will be our chance to see the new Aprilia RSV4 in action stateside, looks like I might need to invest in a longer lens

From their site:

Do you have a photo pass or super photo pass available?
Not at this time, but it is something we are working on. However, you may not need one; we have been called one of the most photo-friendly race tracks in the country by the professional motorsports photographers who travel from track to track. Even without a photo credential, the photography opportunities from our grandstands and raised berms are magnificent; just bring long lenses, because this is a biiiiig place!

my sister lives near there and has been to ALMS there twice. She's had no problems getting shots there w/o anything more than a 200mm lens.