The iris societies in Tennessee and Kentucky are pretty active. I only have to drive about 10 minutes to any meeting. We have a very active website and great communication through email. I love the programs and the shows.
We often go to Regional Meetings in Tennessee and have hosted several here in Kentucky. I do not think I would drive 90 minutes to go to one but I might for a sale if it is an active group. This group is a better one if you make contacts and have something you can trade. You can find out what grows well and see great pictures without paying for a catalog! Some clubs have great participation and some have really aging populations that cannot garden much any more and may need to disban but their knowledge is gratefully shared.
If it were closer, I would advise joining but not if you have to go that far away!
