Yes I too have renewed within 30 days after expiring and no problem. I actually called the passholder line and they told me no problem. I just went to a park guest service window and renewed. I plan to renew again in October since I expire on Oct. 20th and will arrive on Oct. 27th. BTW, you can also renew online now too. You just need to login to the passholder website. Not sure if you are mailed a voucher or if it's willcall--I've never done it, I've just seen the catagory.