Generally no. If want to help them out you can buy spider ladders, but it is much easier (and cheaper) to drape a length of loo roll over the side of the bath for them to climb up.
With sub-aqua gear on ?
this is a myth - spiders DO NOT come out of, or go down - the plughole
They generally live just above the bathroom door - waiting for lunch .....
Just make sure that you check the corners too !!!