covaithe
Explorer
I've put both teams in fairly random order; if you want them adjusted you can post their starting positions with your init rolls. Anywhere north of row G for Evilh, and anywhere south of AA for renau1g.
Roll init separately for each group of identical monsters. No duplicates here, so each monster gets its own roll.
The river is 20' below the bridge. No falling damage if you go in, but if you don't have a climb or fly speed you'll have to make climb checks to get back up. The round stone thing around R10 is a low ruined tower, the remaining wall is about 5' high and can provide improved cover to medium creatures, just cover to large ones.
Trees are difficult terrain, and having one complete square of trees between you and an opponent provides concealment. Two squares provides total concealment.