Ding Dong Ditch Achievement?

I need help getting the Ding Dong Ditch achievement. It's literally the last one of the Hellroaring achievements I need to get and I've done exactly what the description says- ran to the hunter camp, howled with my mate (in fall, in daytime) and ran back to the park. We got shot AT, but neither of us was hit.

I thought the achievement would pop up when I crossed the park boundary, but I've done this several times and nothing. Am I doing something wrong? Any advice would be appreciated, thank you in advance!