I've recorded a lot of jazz music, live shows and studio affairs. I don't entirely agree that you don't get the interaction between the instruments with close (or semi-close) miking. I usually find that bleed between the mics tends to weave all the sounds together nicely. I've never been a big fan of stereo or ensemble miking in jazz, as it's hard to play so precisely consistently and controlled that the acoustic balance is perfect through an entire piece (and an entire session / album / three sets!).
But, as for close miking, two things come to mind. One is, I don't place the mics as close in jazz as rock or pop, generally. A healthy amount of bleed is usually a good thing. Second, the quality of the mics, and therefore the quality and tone of the bleed.
I'd say your mics are good enough that the bleed should work for you. If you hired me to do it, I'd probably individually mic everything (if allowed). If you really want the stereo thing, I'd probably start (as you said) by trying the 300s as the pair, and filling in from there. As Bob O said, the sound system is a consideration (another reason I'd close-r mic). For the best results, set up the pair, find a good sweet spot, then fill in as necessary for what's lacking in tone, definition and level. I'm not very familiar with the Royers or other Gefell to suggest what would go where.
My final thought would be - hire someone you can trust and communicate with, and do a test-run or early sound check if possible. (I did a few live recordings where my mix began on the first note of the first set). Allow them to add some input or ideas on getting the sound you want. If you hire a good engineer, you might not want to entirely pre-determine their set-up.