The records can be found here
http://www.scta-bni.org/bonneville-records.htmlI would suggest get a rule book now... even though it will be a little outdated, so you can get started. Then join the BNI after the first of the year to get a new rulebook, pit pass, the ability to run Bonneville at a SCTA event, poster, patches and stickers.
If you want a smaller, more laid back event than the big show, join the USFRA. Same rules, same records, same salt... long weekend event in September instead of August
The BMST is the all bike event, usually around the end of August, first of September. They run on AMA and FIM rules.
Of course, my preference is race at all of them... and I do.