if you need some good maps try
www.jdmcox.com
its got topo and aeiral maps, also to get an idea about elevations and what not try
www.googleearth.com
it shows the world in 3d, both sites are free, the reason i suggest the first one,, it can be used with your gps, if you use one. if you try it out , know the corridinates for your area if you can.