We spent a total of a month this year off hookups in the National Forest in Northern New Mexico. We bought a 2350 specifically with this kind of camping in mind. For the two of us and 55 pounds of Sally Ann the Wonder Dog, it is perfect. Essentially, we escaped the heat of the plains and came home last weekend to much cooler weather. The large black tank in the 2350 makes this kind of camping possible. The 200 watts of solar I put on the roof and the additional 100 I added in a portable setup with a 50 foot cord (since we camp in trees and have limited sun on the roof) allowed us to have great batteries at all times, even during several rain days. Many NF and BLM campgrounds in the drought of the West allow you to "drip your gray" tank, returning to the earth the water you take from it.
In a few years Sally will be gone and we probably will go back to Class Bs and just tour the country. BUT, a 2100 would be perfect for that as well and have the luxury of a dry bath and more room in general.
Paul