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LTC2960 MR Input require a Pullup Resistor if the pushbutton is several feet away?

I'm considering using the LTC2960 to provide the SHDN input to a LTC4417.  However, the MR pushbutton (input to the LTC2960) will be at the top of the cabinet  and will be several feet away from the card with the LTC2960.  I'm aware the the current is small so the IR drop should be low.  In additional the minimum detectable pulse width is 20uS and we will be using shielded cable.  Should an additional pull up be considered (Vcc will be >20Vdc)?  Is there a better part (with low Iq and better noise immunity)?  

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