Black Raspberry Trellis–Pictures Wanted

I found some black raspberries whilst huckleberry picking this year. Man I was blown away. They were amazing.

I believe they're native (God forbid we have another invasive bramble in the PNW) so I saved some for seeds and will attempt to grow them but I really cannot wrap my head around how to trellis them.

I've been reading extensively, but I just can't visualize the best way to go about it.

If you grow black raspberries, can you show me your setup? And I just can't believe they dont spread underground. Is that true?