how long of a drive??

[leafspice.livejournal.com]

Hi all...I'll be traveling to Cape Cod for the first time this weekend. I know Mashpee (where I'll be staying) is only about 70 or so miles away, but I know that traffic going onto the Cape can be horrendous, plus the fact that I'll be leaving the Friday before 4th of July! Does anyone have any estimates, based on personal experience, on how long this drive might take me?? I want to arrive sometime around 3 or 4 PM...

Thanks!! :-)