Working with influencers in niche markets can present unique challenges but also rewards. Here are some potential difficulties and ways to mitigate them:

1. Limited Audience: Niche influencers, by nature, have a more limited audience. You might have to collaborate with multiple influencers to reach your desired reach and frequency targets.

2. Finding the Right Fit: It could be challenging finding influencers who genuinely resonate with your brand and its values. Influencer marketing platforms like Flinque can aid you in sourcing influencers who align with your brand persona and target audience demographic.

3. Content Relevance: The content produced needs to be meaningful and valuable to the specific audience. Therefore, flexibility with content creation is essential.

4. Measuring Engagement: It could be more challenging measuring the success of a campaign as conventional metrics (likes, shares) might not capture the full picture. Tools providing detailed analytics can assist in evaluating the campaign’s impact.

5. Costs: Collaboration costs could be higher as niche influencers are often aware of their unique market positioning and might charge a premium for it.

Implementing strategies like setting agreed KPIs, providing clear campaign briefs, establishing a professional and committed relationship, utilizing appropriate influencer marketing tools, and setting a realistic campaign budget can help overcome these challenges. Be prepared to adapt and learn from each campaign, the niche may offer unexpected surprises and results.