These two are the basic areas. All campsites take 1 battles.
They can be done with just the cards and stuff you got initially, although you should not forget to add the new earned cards to your deck.
Everyone's HP is low here, so get use of it: put in pegasi in your deck what is cavalry AND can not be stopped by randomly placed monsters, as well as longbows (elven card too), what if placed the farthest initial place can imediatelly cause 2 damage to the opponent if no enemy monster is in that row.
To block things it might worth to put in some ogres if you manage to get some (hint: Shimmering Crystal Cave in the Challenge Hall might drop you).
these areas are EASY, should not require too much planing ahead.