I am going to Belgium for a few days and wondered what flying restrictions there are ? We are staying in the country not a city so other than the usual things to be aware of is there any others ?

A bit late to the party, but both countries are part of the EASA area, so you can visit their website and then check for additional Belgium and German rules (which there are)
https://drone-laws.com/drone-laws-in-belgium/
https://drone-laws.com/drone-laws-in-germany/
(not official websites, but it was the first that came up on my search)