Should I carry spare fuses?

Im quite new to caravans and am not very confident about my van.  I worry I wouldn't have a clue what to do if the electrics stopped working for instance.

ive got an Elddis Hurricane and I know that there's some sort of electrical switch box in the bathroom cupboard.  Then switches on a panel in the main caravan.

im assuming fuses can blow like in a house?  Should I take fuses with me so I can try and replace if necessary?  And if the electrics do stop working is this the likely cause (after checking the ehu post hasn't tripped).

thanks.