You can get an excellent book (numerous to choose from on the subject) a 7.5 minute topo map of an area you like, compass and learn it yourself!!! It's not hard and you'll save money.
Both of my kids learned it on their own at the age of 12 and 13, by reading and doing. Now it's second nature to them every time we go camping.
If you've figured out how to use a smart phone, word or surf the Internet, you can teach yourself how to do land nav with Map & compass.
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