Be aware that directgardening.com has a 78% negative rating on gardenwatchdog.com. But maybe it will help you find a name for a red cultivar that you can use to search on. I just wouldn't buy it from them.

Which "native red raspberry" is it that you can buy? Rubus probus is said to be Australia's best, but I have been unable to buy it here.

Mila - sounds like you have a plan, and I know what you mean about not wanting to wait to follow through on your plan. There's always room for more roses if you get creative! Glad the pictures helped you get tempted - they're all great climbers and you can't go wrong with any of the three you mentioned. Summers - for sure you'd have to finagle a way to attach the canes to the trees, and that's getting way too close to Quadra for my skin's sake. He's big and thorny, and between two trees he'd be just waiting to pounce. For sure you'd need another kind of support in addition to the trees, or he'd be flopping on your other roses as you mention. I used to grow my Quadra as a free-standing bush and he was at least 7' wide and aggressive with space. Can you stretch some sort of trellis or arch between the trees for extra support? He might not bloom as much in part shade beneath trees, but I'm all for giving it a try if that's where he is. I have Veilchenblau beneath a huge oak tree and it's pretty impressive (though it doesn't want to climb). Cynthia

For what's it worth, I'm in Panama City and found it frustrating to grow rose trees. In the past 2 years, I had zero luck with rose trees from Lowe's. It was very frustrating to see 2 trees die within a week of purchase (kept in their bucket, well water). Gave up on that, bought a Julia Child rose tree from their main competitor while I was in Atlanta last year and it survived for a few months but struggled from the moment it was planted into the ground. After a couple of months, it was dead too. So I visited a local nursery while I was in Birmingham AL last month. After a careful inspection, the number of grafts (or branches) were greater and larger size/diameter too than those from the big box home improvement stores, the height and diameter of the trunk was greater and so too was the size of the bucket it came in. The local nursery bought these directly from the grower as bare root and planted them into their own buckets. The quality is visibly different, much higher, than those I bought in the prior failed adventures from Lowe's and HD. In short, I suggest you shop at your local nursery rather than buy online. The trick is to find a great quality nursery in your area that sells high quality rose trees. You'll know it when you see it. The nursery where I bought mine was an old school mom and pop type nursery - clearly not a fancy place but the selection and quality of the various roses and rose trees was phenomenal. It was clear to me they bought higher grade rose plants and trees that are not likely available for direct purchase by a consumer like you and I from the grower. Should you buy online, I doubt you'll get 5+ well sized healthy canes on a rose tree trunk. Every single one of those rose plants and the rose tree I bought from the mom and pop nursery have grown exceptionally well since their planting last month or two. I paid more than those found in the big box store but they have grown better than the others planted at the same time from the big box retailers. I've learned my lesson - find a mom and pop nursery and buy those better quality plants from them.