Forming Hunting Club need insurance - advice needed!

small group of guys, we have been hunting 340 acres that we own. so never formed club or worried about hunting club insurance.

We are in process of leasing additional acreage adjacent to our property, so need to form club and get ins. Need recommendations for:
1. best/easiest way to form club, &
2. best/easiest/cheapest insurance? (We already have $1M general liability covering our property - looking at La Forestry assoc. for ins. at this point)

Thanks in advance