Deathsquitos are handled depending on whether or not you can't take a hit while blocking with a shield. If you can, block then swing. Otherwise just time your swing to hit it before it hits you and hope for the best.

The Tar Pits are annoying because the growths hit you with this tar crap which slows you down incredibly. Best handled at range with a bow.

Fuling Camps.... lots of bow use from the periphery until you whittle them down to nothing. Takes a while.

Generally the bow is a great way to handle most things in the plains which haven't already aggroed on you.