Organic traffic growing sloooowly

You need to keep building your audience. Stop thinking about SEO as the foundation of your traffic. SEO is nothing more than one way of hundreds of ways to attract traffic to your site.

Start building your audience in social media. Facebook is obviously the biggest opportunity, but you'll need to be prepared to pay to play there.

I used to work for a company that was the major player in a specific niche online. The biggest site they own attracts most of it's traffic from Facebook, and not from organic traffic. Basically the site had multiple large Facebook pages sending traffic to it.

If you don't have money to invest there, start with Twitter, Pinterest, Tumblr, etc. Start following people on these sites and building a following on each social media site.

As you build your audience on each site, you will begin attracting natural links from your mini audiences on each site, and this is one of the ways social media helps with SEO.

Are you collecting email addresses? Build your list and send your followers back to your site to consume more content.

With the list, you can sell products, and then you'll have the money to invest in FB ads, Adwords, email campaigns with other travel website lists, etc.