The best advice is to try it and see how well you do. The only way to get better is a multi-frequency GPS and that will cost you a lot more.
I am looking for centimeter accuracy in what I am doing and you can see here what lengths I go to to get it in the forest. If your trees are short enough then this will work for you too, but if you don’t need that kind of precision then maybe you are happy with “float” status instead of “fix” and that will be error-corrected and still better than a single GPS.