Campnab - Nab that sold-out campsite!
Img.vision - Image hosting & video hosting for eCommerce sellers
Hipcamp - Book unique camping experiences on over 300,000 campsites, cabins, RV parks, public parks and more.
UploadHouse - Thumbnail and resize your photos and images
Campflare - Get notified when there are campsites open at your favorite campground. Its free.
ImageVenue - ImageVenue is a great online hosting service that allows uploading pictures for showing creative works with a simple-to-use technique.