Nobody can answer your questions. The issue of extradition or not is entirely up to the whims and will of the prosecutor and court.
I have seen cases where extradition was done in an election year (good press for the prosecutor and/or court) where it would NOT have happened in a non-election year.
Even if they don't exercise their state rights, are you willing to put up with the 'ordeal and cost' of remaining in flight. Your warrant will likely (at some point) be put into the NCIC system... and if you are stopped anywhere in the US, the warrant will pop up. The local police will detain you, tow and impound your vehicle (if one) and contact the issuing agency (in PA). The agency can then simply say.... "nah, too far" and you will be released... with the costs of tow, impound and possible lost job. All to happen again the next time. Won't take many of these incidents to cost far more than just being a mature responsible adult would have been.