Sometimes that's the only way they'll take it (the medical syringe). We're using them to dispense medication right now, and it doesn't seem mean to me just difficult, LOL!!
I would say 4 hours you'll be OK w/o pumping, too. My girls surprise me with occasional 5 or 6 hour stretches and although I have SUPER hard breasts, I'm fine, KWIM? I go 4 hours sometimes and that isn't nearly as bad.