i would just renew your callsign in late July or some time in August so that your expiration date cant interfere with any applications you have in process during October. Renewal is free and you can do it up to 90 days prior to your expiration date.
The only list of people who want the callsign you desire that will matter are those who file a
valid application for it on the first day it becomes available -- therefore, i highly recommend that you visit:
www.ae7q.com and read the application notes and the explanatory notes there to familiarize yourself with all the dos and donts of obtaining a vanity callsign.
