To answer your final question, yes but not really. You can definitely use AdWord keyword planner tool to get solid organic search volume estimates. However, don’t just stop there. Leverage other tools to find longer tail variations you can map against various stages of the buyer journey. I like to use SEMrush, Keyword Tool.io and Google autosuggest.
We hope you found some of these tools useful. It's worth noting that if you don't have any content that suits a particular keyword, you can always create it. Just remember to make sure that the content answers the search query that you're trying to target. For example, somebody searching for the term 'Log Cabins Phoenix' is not going to be satisfied with a page that offers log cabins for sale in New York.
"Our whole team has a copy of Keyword Researcher, we use it for everyone of our client's keyword research for the 'Long Tail' and we use it every day to come up with blog post ideas and ideas for guest posting. We couldn't live without this tool. I have used every paid keyword research tool under the sun, and this by far is my favorite tool for mining the Long Tail."