First trip with new baby advice

Hey everyone, my wife and I can't wait to introduce our little girl to camping and are looking for any advice anyone might have on what to bring/do and want not to do. She will be 1 in July but was born 3 months premature so will be closer to a 9 month old when we head out. We've got a few weekend trips in May/June planned to test things out but then in July we are heading out for a 3 week trip to Idaho, Oregon and Montana...which might be a little ambitious but go big or go home right?! Thanks in advance for your tips!