You must go to the Pilgim Office and ask and follow their advice in early April!
The weather is only one part of the equation. The other part is the
condition on the ground in early April !!! In addition, considerable snowfall is predicted for the 1st of April, it will be cold with wind gusts of up to 70 km/h (!!!) although the predictability level is still low.
Weather report for Col de Bentarte (Friday, 1 April 2022)
Night and day it is cloudy and snowing. Heavy precipitation of 20-30 cm is forecast for Friday. The sun will not be visible. The chance of precipitation is extremely high, exceeding 95%. Temperatures as high as 0 °C are foreseen.