Good old permits, heard many of not so good stories about people being escorted out of areas for not paying for permits to access public lands. What areas were you thinking about taking your daughter in? Paying for permits and backpacking into crowded spots, only to find the " medicinal user", and the other local yahoo who forgot that defecating in a designated camp site was "not cool dude" is something to avoid at all cost. Most wilderness areas once you reach a certain point will have a box asking you to register with a simple form to fill out. If your asking about areas such as the Olympics many places require you to register before hiking and charge a fee. Look on the website of the area you are accessing ie national forest, wilderness or national park and they should have the low down on what you need for that area.