preferably in NY and northern PA?
or personal recommendationsof any trails in these areas

l use the ''National Geographic TOPO! Outdoor Recreation Mapping Software'' its a little expensive, but well worth the money.
http://trails.com also sells decent maps that u can download online.
Google Earth is definitely the cheapest option out there, but theres no topo information, & the resolution can be poor depending on the area.
Aviation sectional charts r a great source because they expire every 6 months, after which they become unusable for pilots, so the expired charts r often given away for free at pilot shops. They r also very accurate & include topo information.

new york/new jersery trail conference has great maps for many of the popular hiking areas of NY like bear mt. the ADK has good maps for that part of NY. Keystone trail club has maps on Pa.

Here is the price list for the Keystone Trails Association. You will find nearly all of the guidebooks & trail maps for the backpacking trails in the state.

http://kta-hike.org/images/PDF_Docs/pricelist.pdf

You can order the guidebooks & maps for the Adirondack region in New York from the Adirondack Mountain Club.

http://adk.org

Here is the link for the North Country Trail
http://northcountrytrail.org/

Catskill Mountain Club
http://catskillmountainclub.org/overnight.html

A selection of books & maps can be ordered from Equinox in Williamsport, PA
http://equinoxltd.com/subcategory.aspx?id=76

l live in Northeastern PA & get paid to hike. I've used the ADK guidebooks for years. They all come with maps. The AT guidebooks & maps r excellent as well. Likewise, I've used the PA Hiking Trails Guide (12th Edition) as a resource to find the right Game Commission or PA Bureau of Forestry Map to plan trips. Free maps of trails located in the boundries of PA State Forests may be obtained by contacting the Bureau of Forestry HQ for that specific area.

http://dcnr.state.pa.us/forestry/

Backpacking on PA State Game Lands is usually not allowed except where specifically designated, as camping on Game Lands is prohibited.

For info on Backpacking in Northwestern PA, u may consult the webpage for the Allegheny National Forest.
http://fs.fed.us/r9/forests/allegheny/

you could Google it.. if you know the name of the trail you want to go on there is most likely a map of it on the net.

trails.com

try mcvan.com. they have about every kind of map from roads to topos

map quest or google maps or just google it in general

u can go on line and ask for maps in the area your looking for then print them out or go to AAA.com tell them what u need mebership is around 40.00 for the whole yr and you get complete road ser if u run out of gas they will bring u some lock out of your car a locksmith flatire they will even help with that.