Ladder yes! A telescoping ladder is one of the best purchases I've ever made. This thing is so handy and so compact. Keep it stored under my bed even though my TV has a ladder. I don't care much for the RV ladder as it is too narrow for me and I don't like the jump down from the last step via the bumper.
How a ladder can save your butt:
Use it to cut tree branches going into or out of your favorite boondock campsite.
Brush off leaves and debris on top of your slide before closing it.
Awning tear repair with eternabond tape is easy with a ladder.
Replace burn out visibility (marker) or scare lights.
Get on the roof for maintenance/inspections etc..