When I did some looking into that several years ago we made up about 20% of the registered voters, but the impact is far greater because we also happen to be the two precincts with the highest rate of registered voters actually voting. I think that the turn out rates brought our impact up to around 30% or so. Each election the Escapee's hold a "meet the candidates" nights and historically most candidates jump at the opportunity to attend.
An interesting bit of history is that over time the voters of Escapees have changed the political climate in Polk county from one of the swing counties to one of pretty solid political lines. That change is what caused the court case that has verified the validity of the Escapee address for legal purposes in the state. What happened was that a candidate for County Commissioner chose to file suit to block the election results when he lost, based upon the thesis that he lost because of the votes of Escapee members who don't really reside in Polk county. That was back about 1998 and the suit tied up the voting rights for us for about four years until it went though appeals all of the way to the TX supreme court. As I remember, it was finally settled about 2002 or 03. It also resulted in the TX legislature making changes to the laws addressing voter registration, driver's licensing, vehicle registration, and several other laws to make it very clear that our addresses are legal. Those laws do not specify the Escapee mail service but spell out what a mail service must do to qualify as a legal address of domicile and were based upon the Escapee Mail Service model.