Was I too much of a prude in this situation?

I [21M] Basically met this girl [20F] on a dating app, got her snap, we were both looking for something casual so its all cool. She wants to go on a date and suggest we do a "drunk hike." I didn't really wanna be a buzzkill but I said I wasn't down to give her alcohol since she was underage and no offense, but a drunken hike in like 100 degree weather sounds awful and I'm not trying to get in trouble. She then offers weed but I say I'm not down to smoke and she blocked me lol.

Was I too much of a prude in this situation? I mean, I get a drunken hike could be funny with your homies but a first date? Sounds kinda sus and a recipe for disaster. I get shes 20 too but still, if something happened it'd be all on me