The other day I noticed a member here on Active Rain bragging about all the "unreal Google juice" she had. She loosely backed her claim up by showing some of the search terms she had a 1st page ranking for. The member stated that "I couldn't teach her anything" because she "already knew it all". This blog shall prove her quite wrong.
You should not assume that search terms you come up with are ones that people actually search. Researching the search volume is one of the first steps you need to take when deciding which terms to optimize your site for.
The member in question has her site optimized for "Hawaii Relocations" and she currently ranks 6 for it, with her ActiveRain page being number 7.
From my knowledge of search... I think people would tend to search for "Hawaii Relocation". I believe people use "relocation" over "relocations" no matter which city or state they need to relocate to. Still, it doesn't matter what I believe. We need to find some empirical evidence. One of the best ways to determine this for sure is the most excellent Google tool called Trends.
The best thing about Google Trends, is that is shows RELATIVE SCALE, and not an actual number. Many people get hung up on the physical numbers given by the Overture Inventory Tool (which is completely worthless.) If we compare "relocation" with "relocations", we will find that I am correct. Relocation is searched considerably more than relocations.

See how easy the data is to understand? It shows over time the relationship of the two terms in Search Volume and News Reference Volume.
If you have never used this tool, and haven't really verified the search terms you are currently after... I highly recommend you doing so.