I'll second SkyNation's comment, Well stated!! Anyway, I've posted this before, but here's a few questions to ponder and hopefully help you make up your mind...
If you called in fatigued and your chief pilot wanted you in his office ASAP to explain your actions would you want ALPA or SAPA representing you?
If you were involved in an accident or an incident would you want ALPA or SAPA representing you?
If you had issues with your medical would you want ALPA or SAPA representing you?
If you busted a checkride or PC would you want ALPA or SAPA representing you?
If the current management personnel at SkyWest were to change (actually happening as we speak) would you want ALPA or SAPA representing you?
If a crewmember or passenger injured themselves onboard your aircraft would you want ALPA or SAPA representing you?
If we were to merge seniority lists with ASA would you want ALPA or SAPA representing you?
SAPA elections have a 20% voter turnout. Who would better able to unify the SkyWest pilot group ALPA or SAPA?
Do you like working 5 and 6 days in a row, with only two days off in between, it happens every month with PBS to junior and senior crewmembers alike. I know reserves being sent on 5 and 6 day TDY trips (That's 5 and 6 days straight flying away from home with no days off) Who would be better suited to address scheduling issues, ALPA or SAPA?
I hate paying 150 bucks a month for car and homeowners insurance, but what if?
How much is your ATP or Commercial certificate worth to you? ALPA may not get me a raise? but 2% is cheap career insurance.