Bike Trailers are a great way to combine bicycling with other activities, golf for example. Here are a few bicycle trailers that can be used with a little modification to transport golf clubs.
The simplest solution is the PaddleBoy Flyer Trailer. This bike trailer is designed for use with kayaks and canoes. Because the trailer is adjustable in length, it could be set to the right length to support a golf club bag. In its shortest position, the trailers main support strut positions the support brackets at 43″ apart, just the right length for a golf club bag. An extra bit of padding could be used on the front v-shaped support for cushioning.