I would go. You know people give birth to live babies in hospitals right? That babies with serious complications stay in hospitals for days, weeks, months? I'm pretty sure your sacked up baby in your ute is just fine.
Op, I'm sorry
From what the responses are telling me, your H's aunt died of AIDS and while her situation wouldn't have hurt your baby, the quoted is not always true. Depending on what infection the person has, you may want to stay far far away. There are many infections you can get while pregnant that have dire consequences to the baby. Even though they are "sacked up in your ute." Its always best to ask your OB.