http://www.njleg.state.nj.us/2006/Bills/S2000/1868_I1.HTM gives a nice summary of current NJ adverse possession and a proposed legal change to shorten the time period.
Here is a NYT article that gives good information: http://query.nytimes.com/gst/fullpage.html?res=9E06E3DF153EF930A15751C1A9679C8B63
Here is a law firm summary including "tacking": http://www.meislik.com/main/cases/summary_mostrecent/2255/
Based on this research, the tacking must be of the same quality as the facts leading to "open and obvious" adverse possession. Tacking will be allowed if the facts leading to the adverse possession claim are equally as strong.
I have seen the recommendation of a real estate litigator being necessary in these cases, one who has experience in adverse possession litigation
in NJ. That would be my recommendation to you. I hope this helps.
I really appreciate positive feedback.
In the future, you can specifically request that I work with you on your legal question.
Please be aware that my answer is not legal advice, it is merely information. You and I have not entered into an attorney/client relationship. The only way that I am legally responsible for your legal rights is if you have signed a written retainer agreement with my law firm.