Thank you, Ann, for the information.
I asked my insurance broker. He says I can add on to my present homeowner's insurance for a small fee, but it's limited to 12 weeks a year. He said if I go over that, it will void my insurance. I may need another company to cover me. I will suggest switching to Merrimack Mutual.
He went to the Airbnb website and saw their claims of $1,000,000 coverage, but from what I've seen here, it is very difficult to get a payout. I live in my rental, which has an in-law apartment, and I don't do instant book, I limit my guests to two adults, and my house rules are very explicit, so I haven't had any problems with parties, etc. But in the event of an accident, I want my home protected.