Awesome! Congrats on getting a pass! I just noticed you are not an actual numbered member of OB yet, I'm not sure if that will be a problem, but you might consider just becoming a numbered member quick before heading on this adventure just to cover your bases. Membership is very affordable, starts at just a one-time emblem cost of about $25 all membership packages are listed here:
https://store.overlandbound.com/collections/frontpage
You very likely won't receive your emblem before the rally, but if I recall you should at least get your club member number assigned the same day you officially join.