Can you take them outside? yes but there are some things to consider
1. proper temperatures/humidity (common sense don't take a BP outside when it is 40 degrees)
2. other people... Our hobby is under fire all the time we don't need nyone getting the cops called on them because they took their BP to a park
3. bugs. I doubt that you will pick up reptile mites (though it is possible) there are all sorts of other bugs that can be a nuisance.
All in all I personally don't think that taking a BP outside is worth the potential risks.... but many people do take their BP's outside.
