As others have mentioned, every rescue is different. Some rescues require fences, some don't. I wouldn't worry about being turned down. Unless you say something totally kooky on your application, I doubt you'd be turned down flat.
Now, no one can tell you how to fill out the application, because the rescue wants you to answer the questions honestly based on what you think and feel. However, I'll give you a couple of hints. Fill the application out thoroughly. We (I volunteer for a rescue here in WI) are constantly getting applications that are either not filled out incompletely or are full of typos (sometimes even the email address is incorrect, and since we send all confirmations initially by email, that's a problem.) It's frustrating when someone gives one-word responses to questions that are very important to us. (If I had a dollar for every time someone had answered "Why do you want a Boxer?" with "Yes" ) Don't go with all caps or all lower case - that drives everybody crazy.
And finally . . . let the rescue know that you are open to education. I think that the volunteers who process applications would rather hear that you are new to the breed and that you know you have some learning to do than to hear that you already know everything about everything. (Not that you would do that, but a lot of people do!)
Just be honest. Rescues want to work with people who want to adopt, particularly people who sincerely understand and appreciate what rescue is all about.
