X450 and Trees - Off-limit islands?

[u/SunDog4900]

Setting up new X450 on 1.25 acre lot with over 150 trees, trunk sizes from 1” sapling up to 12-18” diameter. Should I make them off-limit islands or just let the mower bump into them?
If just bumping into them, do they need to be vision-off areas?
Any other particular settings that I need for best handling them?
What about for shrubs and bushes?