Thanks to all the great input from folks on this site, we have decided to purchase a Nash 23D. The last option we are trying to decide on is the generator. What are the advantages and disadvantages to getting the generator built into the Nash at the factory (besides the $2900 cost)? We had a class C before with the generator built in so we don't have any experience with the portable generators. We plan on doing a lot of boondocking and forest service campground where we won't have hook ups.