NextGen Gallery limits

I’m sure someone will correct me if I have this wrong.

The website I’m creating has several avenues of interest. One of them is local country walks. I have 8 walks outlined already, each one on its own individual page. Each page has a route map for the specified walk and a gallery of photos to match. Am I understanding correctly that even for the paid version of NextGen gallery there is a limit of 8 galleries? If I was to put all the images for all the walks together under one gallery named ‘Country walks’ it would be chaos. However, it would seem with just the eight galleries I require already, my quota would be used up with no further gallery available for other interest photos on my website. Any ideas on how I can get around this? Is it possible to create a ‘Sub-gallery’ within an existing gallery so I could then separate the individual page images?

Any suggestions would be appreciated. Many thanks.