Ideas for a thank you gift

Takethedogalong

I want to thank our best friends for something they have helped us out with this last few months. I have got a good idea, but thought I would just see if anyone here has something that might work out nicer.

They are long established Club Members, have a lovely new caravan and go away as much as possible, with their elderly dog, sticking to this country with the van. Like us, they use Club Sites and CLs, have their van well equipped for quick getaways, occasionally
use an awning, don't BBQ much. I was thinking something around the £50 region. Any ideas, related to Caravanning?