When you retire, you will have more time, so no need to drive exhausted after work to the trailhead. You can go at your leisure, on weekdays. A camper-trailer would be great for all that trailhead camping. Nice to come back off the trial and take a shower and have a few luxuries, without the expense of a motel. When I climbed, a couple I knew had a VW Vannigan (Spelling??) that seemed perfect. They never had to crack into their backpack the night before a trip - just sleep and eat in the Vannigan. Only thing about a separate trailer, think about what kind of roads you could haul it up.