I have an H18 without spin and an F18 with spin. Not quite your combination of H18 with spin, so my advice may not apply to your situation.
On the F18, and assuming you're in double-trap conditions, as we come close to the A mark ~50-75yrs out, I (as skipper) stay on the wire and move back, get my foot in the footstrap and play the main sheet to manage boat heel. Crew comes in ~20-30yds before the mark and releases cunningham, rotation, jib, and pulls spin tack to the end of the pole. Depending on wind speed (lighter = earlier), crew is hoisting spin while I come in off the wire. How deep I steer depends on wind speed and crew strength
. As soon as I come in I'm raising the dagger and sheeting in the main to about 90% of upwind trim while the crew is sheeting in the spin and we're immediately heating up to get the apparent wind machine going again.
Advantage to this strategy is to keep the hull flying and boat speed up through the transition. Skipper can keep his "head out of the boat" and the crew attends to the details. I'm a big believer in delegating tasks to the crew so the skipper can focus on steering a proper course, avoiding marks, other boats, etc. Not so easy with green crew, but works amazingly well with experienced crew.
I don't travel out at all on the main. To keep boat speed up, jibes are as quick as possible, but not so fast that the crew gets ejected from the boat.
We've done jibe-sets as well- timing is usually immediately after I come in off the wire while crew is finishing the hoist and getting ready to sheet in. Communication is key here.
H18 is much simpler, I've usually managed bear-aways with the traveler. But I have to admit I haven't raced it in several years and was never confused with a "good" H18 sailor.