There are thousands of places where you can park your laptop.. Some are free, Some are Fee, some are "hidden" (meaning not listed on J-wire) but most of them can be found at
http://www.jwire.com
So if you just visit that site, enter the zip code where you plan on parking your...... . Stuff, and feed it a radius, It will find Wi-Fi sites for you.
NOTE that I have found a few that J-Wire does not list in my travels.. For example.. The place I used to go for breakfast and still visit on occasion
In addition if you wish your cell phone. assuming the cell company has coverage, may be useable as a modem (mine does up to dial up speeds) and if you wish to spend the $$$ your cell provider can sell you an "Air Card" (usually around $200.00) that can hit DSL speeds.. Again, Depending on the coverage. Usually 40-60/month 2-yr contract
Finally if you really want to spend money.. There is a 2-way satellite system you can use... Hughes. Contact me and I'll get you to someone in your area who can sell you one,,, These systems run from around 1,000 to 6,000 installed. 60/month, 2-yr contract, suspendable for up to six months a year