I sometimes take the 10 to desert center drive. But then you have to go through parker and around the lake if you're staying in Havasu. But Desert Center Drive can be pretty dangerous too. It's a two lane highway and people are constantly passing. I've seen a few close calls. The 40 is deffinitely safer. If you really wanted to take the time you could take the 210 to the 15 then the 40 but it sounds like a long detour for you.