Not a dumb question at all!
Brake assemblies like the Dexter Nev-R-Adjust Electric Trailer Brake Kit - 12" - Left and Right Hand Assemblies - 7K # 23-464-465 are either sold in matching pairs or as single brake assemblies for either the left or right side of the trailer # 23-464 (left) or # 23-465 (right). This particular kit is sold as a pair, so if you have tandem axles on your 2014 Grand Design Solitude 305re you'll want to order 2 of these brake kits.
Additionally, these brake kits... view full answer...
The Swagman Traveler XC2 Bike Rack for 2 Bikes - 2" Hitches or RV Bumpers - Frame Mount Item # S64663 comes with an anti-rattle hitch pin but if you want a locking one you'll need the Locking Anti-Rattle, Threaded Hitch Pin for Swagman 2" Hitch Racks Item # S64027 view full answer...