Hey and welcome! Not sure if edf's are allowed at 3-0 but maybe someone else can chime in. Depending on how far you are from grassfield that might be a better option as space is a lot better (if you can takeoff from grass). Also depends on how hot you fly the jets since they can eat up space very quickly...
My 64mm's are great for smaller places. I've gotten one of them up to around 95+ mph on my first flew flights with them. After that, I NEVER have gotten them that hot again. I can't take off grass unless it's pretty much just compact dirt, I'll end up bouncing around all over the place. Then again, I haven't been over there so I don't know what the place is like.
Typically, I'll fly small patterns, do a few touch-and-go's and that's it. I've outfitted my 64mm's with flaps so I can really slow it down if needed.