Hi again.

So, I have my first plane, and have never been to a flying field before. I have two questions.

1. The RTF Alpha 40 I bought came with two plastic "flags" that have a 4 on one side, and a 3 on the other. I know this represents the channel my radio uses (43), but what do I do with them? Do I hang them on the Tx antenna when flying, or is there another purpose?

2. There is a dedicated flying field not far from me that I plan to use, but what about flying at other public locations? For example, there are several large parks in the area that are maintained by the township. Aside from any local ordinances (which I have not been able to find) that prevent it, is there any reason I can't fly there?

Once I'm able to fly solo, I just want to know what my options are. Thanks in advance for any input!