West Suburban Humane Society has a secure server for donations on their website.
I don't know if there is a way you can mark that it is from Katie's Gotcha Day Fundraiser though.
If you go to this page:
there is a button for click & pledge on the right hand side.
I would like be at the BSCOW picnic this weekend too, but I haven't RSVP'd yet.
Thanks so much.
Still hope to see people at the fundraiser!