G'day fallow.
If it was me I'd use Bambi & the yearling during the rut as this will let him spend more & energy doing his job than fighting with fleetfoot.
A master & an apprentice is a well proven way to get the best out of these deer.
Never have 3 bucks in together with does during the rut,the two most senior will fight & when the looser is beaten the young one will take the opportunity to kill him.Then you'll have 2 again & the rut will drag on & the fawns won't be dropped in a nice cluster.
A breeding unit for me is usually a master & apprentice with 30 does in 25 acre enclosures.They never share fences,I rest or have another species in the enclosure beside or between units.
Once weaned the majority of the boys will never see or smell a girl again, I have no problem keeping them all together & in hard antler by following the above (no sight or smell),I don't even get a croak out of many of them during the rut.These bachelors are often run with the red bachelor stags for similar management reasons,except the antlers are removed from the reds.
I dont loose any from fighting.
On the OP again, you dont need to worry about the bucks during fawning,but have the bachelors in their own enclosure 4-6 weeks after the days start to shorten.The fawns will be 8-10 weeks by then & a month away from weaning.I tag at this time too.
Often I dont wean the doe fawns(they are kept with the dam & I work out their future when yearlings) just the bucks.If nutrition is good & its also affordable these weaned boys can be put in with the older bachelors,just make sure there is plenty of nutrition & protien for them all.
Cheers Sharkey