I've seen a couple guys build bow carriers that hold the bow in front of the UTV , similar position you'd mount LED lights etc. I'm sure there's someone on here that does similar.
I think 10s, 15's and a spotter are super hard to beat. Its amazing what you can see with 10's on a tripod and they work awesome for hand holding. I've used 12's but the versatility you get by the 10/15 combo makes it a winner in my book.