The easiest thing you can do for week long trips is rent a car (yeah it costs $$ but so does towing setups). We did that the first year before we got our dolly.
Other than that you can either:
- Get a full trailer
- Get a dolly
- Flat tow
It looks like Honda won't let you flat tow the Element. Thus you could either use a Dolly or trailer. There are pluses and minuses for either (Trailer more $$, Dolly slightly more complicated to setup, Trailer takes more room to store, etc.).
There was a long thread about this very subject not too long ago...