As others have said, LSD Tolerance builds up extremely quickly.
Speaking from personal experience, on the one occasion I've tried to trip two days in a row it was a failure, admittedly I did try taking the same dose 1 tab @150ugs (yes I know blotter potency is fickle)
The way I see it, you have two options.... well, three, but the 3rd option is being sober for a day.... and we don't need that kind of negativity here
Option 1. Up your dose every day, and just accept the fact that you may just end up eating a bunch of expensive paper that doesn't do shit cause your tolerance is up. Other downside to this is what Lucid has been trying to hammer home- you may not actually have Acid......which could end very badly.
Option 2. Mix it up! My last 3 day festival I got drunk and rolled the first day, 2nd day I rolled again ( not recommended...i was dumb) 3rd day I tripped balls on some great Acid and had a fantastic time.
Personally, if I was you I'd drop Acid on the 1st or 2nd day, and Find some Good MDMA for the last day, so the festival is over while you're coming down from the MDMA.
Up to you though, that's just my advice, I treat my LSD like it's a treasure, so I can't imagine wasting bulk tabs trying to do it multiple days in a row, it's too special to me.