Swamp Hazards [PF]

[Slylizard]

So my group will be dashing through a swamp soon and I've a bit of writer's block coming up with some things to annoy them on their way.

I currently have an encounter planned with some trolls and lizardmen (around some boggy water), but wanted some non-combat encounters for them to play with.

To give some context, they'll have just finished a fight defending a small fort from an invasion, before being asked to retreat and warn the next target. So they'll be tired and hurting already.

Anyone have some ideas I can make use of?

[Crasical]

Tons and tons of rotty, grubby, swampy hazards.

http://www.d20pfsrd.com/gamemastering/traps-hazards-and-special-terrains/hazards/environmental-hazards/ear-seeker-cr-5

http://www.d20pfsrd.com/gamemastering/traps-hazards-and-special-terrains/hazards/environmental-hazards/green-slime-cr-4

http://www.d20pfsrd.com/gamemastering/traps-hazards-and-special-terrains/hazards/environmental-hazards/leeches-ghost-leeches-cr-1-2

http://www.d20pfsrd.com/gamemastering/traps-hazards-and-special-terrains/special-terrains/tentacle-mold

http://www.d20pfsrd.com/gamemastering/traps-hazards-and-special-terrains/hazards/environmental-hazards/mundane-insect-swarms-cr-2

http://www.d20pfsrd.com/gamemastering/traps-hazards-and-special-terrains/hazards/environmental-hazards/poison-oak-cr-1-or-3

http://www.d20pfsrd.com/gamemastering/traps-hazards-and-special-terrains/hazards/environmental-hazards/rot-grub-cr-4

http://www.d20pfsrd.com/gamemastering/traps-hazards-and-special-terrains/hazards/environmental-hazards/spider-vines-cr-3

http://www.d20pfsrd.com/gamemastering/traps-hazards-and-special-terrains/hazards/environmental-hazards/vine-viper-cr-1

http://www.d20pfsrd.com/gamemastering/traps-hazards-and-special-terrains/hazards/special-hazards/bowel-worms-cr-6