I pulled my C&C 2+1 (with extended DR) with my F250 for years, including up into the mountains of VT, with no problems at all. Loved that set up.
I wouldn’t touch a Sundowner given the many issues they’ve had with quality assurance and (lack of ) customer service. A quick search here should bring up quite a lot of info.
When I bought my new trailer this year (downsized to a 2H GN with DR) I really wanted a 4Star. Couldn’t find one locally and ended up with a Platinum… which I’ve been super pleased with. Just to give you another option.
Happy shopping.