As long as you're in European Union right? Would imagine going into Eastern part would still require some checks at the border?
Recently I'm much more into camping/hiking rather than visiting other countries, should probably change it in nearby future
On the offtopic - finally after spending hours reading stuff like
https://gritroutdoors.com/expert-guides-tutorials/ I've decided which tent to get! Probably've spent more time researching than actually camping in last few weeks.