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34 weeks pregnant. Should I go to the lake this weekend?

My parents have a pontoon boat and they are going to the lake this weekend. I would really like to take my 20 month old because she has never been. I feel this is my last chance to go since I am due in July. I wont want to take my newborn. We would be about 30 minutes from a hospital. Should I go?
I had my daughter prematurely at 34 weeks. I had preeclampsia with her. I am not showing any signs of it this time though.