You could try a twink bracket.

If you go 70, in the 70-74 bracket, you can do arena too.
If you go 72 or 74, you're stronger in battlegrounds, but cannot do arena.

The 70-74 is a very populated twink bracket.
Lots in the 80-84 bracket too, but not sure if that will remain a twink bracket or if it is people leveling up.

If you go with a twink bracket...
A single weekend of dedicated play, will get you a full set of PvP gear including weapons.
Which will never need to be upgraded.
You'll equal everyone else for Best In Slot, at least for PvP gear.
So you'll win, based on your coordination, timing or skill.
And will not lose because they outgeared you.

Not sure how Hunters will fare in the higher twink brackets.
But doesn't hurt to experiment in each bracket, to see if you like one.
If you do, disable experience and you're set.
If you don't, continue to level.