When I went to my first seminar, I'd had 3-4 months of Aikido in a dojo that mixed Yoshinkai and Aikikai styles (and been booted out of it
), and it was an Iwama seminar. Everyone was friendly and nice, and no one complained about the very small white belt with a funny stance and giant rolls. At least not to my face. I don't recall all of the sensei's who taught, but do fondly recall getting help from each of them as they travelled the mat (Thank You! once again to Alexander, Goto, and Tatoian Senseis...hmmm, is that the proper plural?)
Any way, I learned a lot, and I'm sure you will too...and if it gets to be all too much, well, I always get a lot from watching. I hope we'll have a chance to train together there!
Oh, one last thing...some senseis don't want their beginners to train at a different style's seminars...me, well, I can't live with rules like that, but I don't advocate over throw of dojo rules, either, so you might want to consider asking a senior or your sensei if it's OK...or not...