First time at a rave.

So finally got some 2cb. I'm going to a rave for my birthday tomorrow with a friend and boyfriend. Boyfriend is doing the 2cb with me.

I have 20mg pills. We are wary about sneaking them in because I know they have drug dogs, but I might take the risk and do it anyway if I have to.

We both have a bit of experience with psychs, and I recently did acid at a techno festival which went well.

Should we take one each before going in? Or any other suggestions? Its 5 hours long. My friend will be on mdma and is quite experienced so should be able to help us out if anything goes bad.