It doesn't sound good to me. I am 210 lbs and when I broke one spoke on my rear wheel with a 32 spoke count it went way out of wack. Had to remove one of my brake pads to get home. I am kind of amazed that the wheel is still relatively true with six broken spokes. Are you sure they are broken? I wouldn't risk it unless you have a sure way of getting back because I can't see how you are going to make it. It sounds like you have an old bike. Can you borrow a wheel from someone who might have an extra wheel or bike?