Patty Purple, my daughter and I have been shooting around ideas for ways to display things at craft festivals too.
For your purse displays, this might be an idea you'd like:
Go to a selvage yard and purchase four inexpensive and visually interesting old doors. Wooden screen doors would be gorgeous, but probably more expensive than indoor doors. Using hinges, connect the doors to each other in pairs. Two pairs, angled in two "L"s, back to back would make a free standing "X", from which you could hang your purses on all sides. Or you could arrange the doors in a zig zag panel, but be careful that they can't be knocked over easily.
For the hangers/hooks to hold your bags, you have a lot of options. You could hang your purses off of homemade hooks made from old metal hangers bent into curlicues and swirls. These can be attached to the doors with wood screws. Or you could even install interesting old cabinet knobs across the surfaces of the doors. Or mix and match. With these ideas, you would have "green" as in recycled/re-used, purse displays.
Ha! I just realized I wrote “selvage yard” instead of “salvage yard” LOL