Advice regarding hutch dampness

[daisy1]

I have two bunnies housed outside. The enclosure is fairly big, and is covered with two tarpaulins for protection from the weather. It has no bottom so is placed directly on the ground( is an Omlet hutch). It is constantly damp. I have just placed barley hay on the front part, but am concerned this will get constantly messy, and due to the size of the hutch it is hard to place this everywhere. Looking for ideas for this situation. Housing inside is not an option.
Thanks

 

[Watermelons]

Photos of your setup may help

 

[daisy1]

I have two bunnies housed outside. The enclosure is fairly big, and is covered with two tarpaulins for protection from the weather. It has no bottom so is placed directly on the ground( is an Omlet hutch). It is constantly damp. I have just placed barley hay on the front part, but am concerned this will get constantly messy, and due to the size of the hutch it is hard to place this everywhere. Looking for ideas for this situation. Housing inside is not an option.
Thanks

 

[Diane R]

https://rabbitwelfare.co.uk/outdoor-housing/