Your RAM 2500 diesel should have no trouble towing the Springdale you're considering. The 300FWBH has a GVW of 10350 and an empty pin weight of 1555. Since it's a bunk house model, I'd suspect that you'll have "back seat passengers" as well as you and your DW. That means increased payload weight before adding the trailer and hitch to your RAM. Typically the pin weight is around 20-25% of trailer weight. Imagining 2 children and their toys, you'll be approaching or exceeding your RAM's payload.
Otherwise, the truck will have NO problems "pulling" that model Springdale.
As for the actual trailer, Springdale is a "great entry level fifth wheel trailer". It has a "hybrid construction" with aluminum bonded walls, but a "spruce floor structure". You'll notice that the 2x3 Spruce floor joists will creak and may sag with heavy weight while walking in the main cabin.
We enjoyed our Springdale, never had any problems with it, and would probably still have it had it not been for a "pesky tree" that fell on it, destroying the roof. The only reason we don't have it is that "tree incident"... Otherwise, it was problem free and performed as expected.
I'd say, if the "weight numbers are right" and the floorplan fits your family's needs, then it's a good choice at an affordable price point. Springdale "gives" you a lot of extras for not a lot of extra cost.