I know many do take tolerance break before a trip, to get as high as possible, but i always increase before a trip to build a stamina. I love researching the menus and want to sample as much as i can, which still isnt a HUGE amount, so i like to increase my tolerance, and thus increase my tastings.
Saying that, my ability to smoke does naturally go through the roof in holland. I think its some sort of holiday state my brain goes into, excitment adrenaline or something. Same goes for drinking abroad too. Could never smoke and drink from breakfast to 1am at home, i'd be out by 4pm, but when in the dam im a machine
Also on the paranoia front, i say this. Weed doesnt cause paranoia on its own. It can heighten worries and it can make you focus on them. just being in an environment where what your doing is illegal can do this. it is so so incredibly liberating walking into a shop and legally browsing, choosing, and then smoking weed in public that the highs, especially the first few visits, are just sublime. i just never get the paranoia that i have had before when getting too high at home. Admitadly ive pulled a couple of whities when younger and found that Amnesia gives me strong heart beat and uncomfortable adrenaline, especially in the morning, but if that happens, i purchase a pastry or something, walk around quiet streets or sit by a canal and relax it out, untill im ready for a beer, then when the heads clear again, ill go find a nice tasting and stress free indica. Love it.