Hi Bailey,
Welcome to the forum!
If you live on the top of a hill, your RadarBox coverage will be fantastic. If you are surrounded by high ground, then you will get a degree of screening, however, if you have an Internet connection you will have access to the RadarBox Network so you'll be able to see all the other shared RadarBox traffic.
As said above, many of the military aircraft will appear in the aircraft list, but not on the map. Also, MyLog will show those aircraft too, so at the end of the day you will be able to see who has been past :-)
I just love the Lakes and visit often, but I think that I would be in trouble if I took my RadarBox on our holidays!
All the best
Allocator