Shopping for Class B Diesel. Advice for newbies please!

Welcome to the forum!

We recently traded in the 35' Class A we'd had for almost ten years on a B. We downsized for the same reasons you're looking at Bs -- easier to drive, we want to see the country more than we want to stay at the same campground for days at a time, etc. We've been in plenty of small Cs and knew they weren't what we were after. The agility of the Bs won us over.

I can't help much with the models you're considering. But for finding campgrounds many of us use RV Park Reviews.