It's not as hard as you think to become a member. Minimum requirement is to ride your motorcycle 1000 miles within a 24 hour period. You must provide all gas receipts and have witnesses at start and finish.
Check out the IBA website for the different kind of rides. Personally, I was very intrigued with the 50CC and couldn't wrap my head around how it could be done. 50CC stands for Coast to Coast in under 50 hours.
On my first attempt, I did it in 47hrs. 46min. Goal was to do it in less than 2 days. Made it with 14 minutes to spare. I'm sure it's not for everyone, but I think it was a worthy achievement and am proud of it.
BTW, my first 1000 miles was accomplished in the first 14 hours. Not as hard as one would think.... but you must be motivated. Thanks for reading!