Recommendation needed for first camper trailer

You could go with the smaller trailer, but for those of us who've been there or have seen this movie a few times, there's a 90% chance you'll regret it and want to move up to a bigger trailer in a year or so.

I know it's not my money, but consider trading out the ZR2 for a used 3/4 ton or a half-ton already set up for towing. Can't imagine either would be in short supply up in Idaho.