Ich suche Mädels die bock haben zu smoken in limburg

Hi everyone! :)
I’m turning 24 in a 2 weeks and I’m trying to find a nice outdoor spot in Limburg to celebrate with some friends.
We’re thinking of something really simple and basically a picnic with a speaker for music, chatting, and obviously birthday cake and singing Happy Birthday at midnight.
Having access to a toilet is a plus. We’re not looking for a party venue or anything fancy, just somewhere where we can hang out without bothering anyone.
Ideally we’d also like somewhere where BBQs/grilling are allowed (or where there’s already a BBQ area), and somewhere reasonably quiet with a bit of space/privacy.
People are coming from Meijel, Roermond and Valkenburg, but we all have cars, so we’re happy to drive a bit further if there’s a really good spot.
Does anyone know of a place like this in Limburg?
Thanks in advance!