Just last week, I sat in an old VW with 35 HP driving up and down the Swiss mountains (twice as big as mountains in Vermont), so it is definitely possible. The question is only whether you want to drive up the mountain going 70mph or whether 30mph is ok. Given that Vermont is a nice state, probably you'd prefer 30mph and 30 HP will be plenty for that.
Just last week, I sat in an old VW with 35 HP driving up and down the Swiss mountains (twice as big as mountains in Vermont), so it is definitely possible. The question is only whether you want to drive up the mountain going 70mph or whether 30mph is ok. Given that Vermont is a nice state, probably you'd prefer 30mph and 30 HP will be plenty for that.