Did you ever get any other replies aside from Isabelle Fuhrman? It's always good practice to send SASE's. The celebrity you are writing too is probably busy and they have to make time to send you something, the least we can do is pay for the return of the item. I wrote to the same people you mentioned and a few others from the Hunger Games cast. Stanley Tucci who plays "Caesar Flickerman" got back to me a week after I sent him a LOR, SASE, and a trading card. Isabelle Fuhrman got back to me a little over a month after I wrote to her. Personally I think 6 months is the average wait time, anything after that you can send out again.

Well how long ago was it you sent out to them?
If it was more then 4 months i would send out again, but anything less i'd keep waiting!

Hello,
Back in October, when I was newer to this site, I sent autograph requests to some of the Hunger Games cast- Amandla Stenberg(Rue), Isabelle Fuhrman(Clove), Leven Rambin (Glimmer), Jacqueline Emerson (Foxface), and a lot of the other tributes (who aren't as prominent as some of the other characters). However, I didn't send an SASE. What are the chances of me getting my pictures back? Should I continue waiting or send back out to them?
Thanks for the help!