That sounds like something we all say at one time or another! It can't be easy. We just had a mirror loosen on our trip this summer.
I hoped that the screws and nuts would be accessible from dash area, I pulled the dash top apart and sealed solid.....well, down under the front cap must be the only way for access to the nuts.
I elected for my 14 year old to get up under the front cap, wrong idea! He started whining immediately that he couldn't hold the nuts while I turned the screws. The wife volunteered to go under the front and we managed to get 7 out of eight removed and replaced with stainless hardware after about 2 hours.
It can't always be easy, or quick, but things on the Beavers can be done, one way or another!