Here is a link that lists every single public boat access in the state of NH. It also lists any restrictions that may be present at that access location.
http://www.wildlife.state.nh.us/Outd...ites_table.htm
Take a few minutes and read through the list to see what types of water bodies have HP restrictions. Note that the chart has a column for acreage, that is the total size of the body of water. The only information that is not present is depth, but that can be found here for a cross reference.
http://www.wildlife.state.nh.us/Fishing/bathy_maps.htm
If you happen to notice a lake or pond on these lists that have a (**) noting additional restrictions. You will have to search for the restrictions by the name of the body of water.
I know BI and myself are well aware of what these bodies of water that have a HP limit have in common, just wanted to make sure everyone else does as well.