Hi April,
Thanks for checking out our plugins!
The Events List widget does give you the option to only display featured events. A slider is not included in the plugin, but you could use a third-party slider (one that supports custom post types) with events. You could test this out with the free version, The Events Calendar, as it would work the same way with Events Calendar Pro.
There is an “Add HTML before event content” option in the settings, which lets you insert content above the main content on all events pages. If you would like this to only appear on certain views (such as photo view but not the single event pages), then you can do a template override.
We do offer full refunds within 30 days of purchase, so if you’d like to take Events Calendar Pro for a test run, feel free to do so! Please let me know if you have any additional questions.
Thanks,
Jennifer