I'll give you an oddball answer! When I worked in animal control, I was sent to a comic convention to inspect a reptile show. Of course, you're not a performing artist and would probably have to pay your way in, but consider if there are other local events drawing folks who might also be interested in reptiles. Steampunk, comics, anime...
When I lived in Illinois, a friend brought me to ReptileFest, an event run by the Chicago Herpetological Society. If you haven't already, I'd recommend networking with them to see if they can give you pointers. My understanding is that they rescue and adopt out a lot of reptiles, although I may be mistaken.
Maybe community parties, library events, etc. See if schools would be interested. Showing up to these would be more about visibility than direct adoptions.
Here's a shot from the hip, but see if there are any local non-reptile rescues that you might team up with. Maybe you can put fliers on their tables to get more visibility for your rescue, or you can join in local parades together, etc.
------------------------------
James Pawlowicz
Humane Rescue Alliance
------------------------------