Reply To: Why are the lakewood rabbanim so against an eruv in thier Town??

To answer in very general terms.It is almost impossible to make an eruv over a large area of non privately owned property according to all shitos and without many kulas. Usually the larger the area the more difficult.

There are so many differences in halachas of making an eruv between the cities you mention it is beyond the scope of this answer to discuss them all.