Thinking about trying hippieflipping this weekend. (Shrooms and MDMA)

Hi all! So I’ve tried shrooms and mdma before but never together. I also rolled 2 weeks ago but am not so concerned about that as I will take a longer break from mdma after this weekend. Going to a trance music festival in the Netherlands. Which also means that the shrooms here are actually truffles so figuring out the dosage is a bit difficult. People on here say that 1 gram of shrooms then 0.1g of mdma 60-75 min later is the best way to hippieflip for the first time. But for truffles I’m not so sure. Anyone have any general advice for hippieflipping or taking drugs for big festivals? Thank you!