First of all, I would like to congratulate you on the beautiful website and for this amazing business. I love how the domes and tents look.
Now, in regards to the issue that you mentioned, I can't replicate it on my side, all the images are correctly loading and you can find some screenshots from my browser for some of the pages that you mentioned here (hidden link) so that you can see that the images load fine for me.
Maybe you are seeing a cached version of the website - can you please try to use a different browser and device or visit the site from an incognito browser window so that we can avoid the caching?