Larger motors, particularly composites, make a lot of noise in small parks and sometimes have attracted unwanted attention. There is also a 3000 foot ceiling that ALL rockets must stay under, regardless of weight. Most rockets using A-E power will stay below this limit. However, if you want to get your rocket back, you'll want to watch what type of motor you use. You could try it, but it wouldn't be recommended.
Streamers are the recovery system of choice on the windier days.
When in doubt, ask the RSO for help in selecting an engine. At our High Power Launches the ceiling is higher, and a waiver table will be available at the launch for you to check your models compliance. Anyone can fly at NIRA events. Membership is open to any persons interested in sport rocketry. However, if you want to become certified to fly high power motors you must be a member of either organization.