When you complete the quest then your reward window pops up and the two rewards offered are the beetle and exp. They both are awarded so its really no choice.
To see if you have completed it properly go to your achievements then to Events then Holiday and it should be the second one listed. Right after New Year/Frostbeard.
The graphic looks like an orange beetle shell or caprice i your inventory. Use the find key and he is listed as "Doomsday Beetle"
You say, 'Hail, Kilna Odenburgh' Kilna Odenburgh smiles at you hopefully, "Can you feel that? It's the winds of change a blowin'! A New Year always brings with it many changes, and many [promises] made to change."
You say, 'promises' Kilna Odenburgh motions toward her husband Garuf with a heavy sigh, "I can't get this old lug to help out with anything! I promised myself I'd get our farm in tip-top shape this year, but I can't convince Garuf to do anything unless it involves [ale]."
You say, 'ale' Kilna Odenburgh throws her arms up in the air dramatically, "All he does is sleep, drink, and belch! I keep telling him, 'The New Year is a perfect time to make some much needed [changes] in your daily habits', but he just keeps his face buried in the ale."
You say, 'changes' Kilna Odenburgh brightens up as an idea pops into her head. "I don't suppose you'd like to stop by our little farm and [help] Garuf make some much needed changes? He's become an expert when it comes to ignoring me, but I'm sure he'll listen to an outsider's perspective. Come to think of it, there are plenty of people in our village who could use a little aid with their New Year's resolutions."
You say, 'help' Kilna Odenburgh grins wryly, "With your help, we'll have Garuf sober and the farm cleaned up in no time! Let me know when you're [ready] to go, and I'll give you directions to our quaint village." You have been assigned the task 'Time for a Change'.
You say, 'ready' Kilna Odenburgh says 'Safe travels!'
LOADING, PLEASE WAIT... You have entered A Quaint Village.
Quest info follows:
Speak to Kilna Odenburgh (0/1) Dragonscale Hills (instanced) -(loc p2788, n100, p14.90 at a house near farm)
Rid the Farm of its pests (0/6) Dragonscale Hills -(Beetles spawn in the farm area.)
Return to Kilna Odenburgh (0/1) Dragonscale Hills
Speak to Garuf Odenburgh (0/1) Dragonscale Hills -(he's near minotaur fort at the lake)
Clear out the spiders in the windmill (0/6) Dragonscale Hills Find Garuf's last stein of ale (01/) Dragonscale Hills -(windmill p2987, p345, pos 39) -(the ale is a ground spawn on the top of the windmill, there's also a locked chest but as I had no rogue I couldn't open it)
REturn the ale to garuf (0/1) Dragonscale Hills
Speak to Garuf Odenburgh (0/1) Dragonscale Hills
Speak to Pizmip Nobbletod (0/1) Dragonscale Hills -(at 3 room house near steamfont zone out area)
Clear the cave of bats (0/4) Dragonscale Hills -(this is in the cave for zone in to steamfont) Loot chunks of meat from scaled wolves (0/6) Dragonscale Hills -(loc p3419, p777 area, in the NW corner of zone)
Give the chunks of meat to Pizmip (0/6) Dragonscale Hills