Typically Carpenters, Laborer's, Painters and Bricklayer Union's are not all that hard to get into... They hand out Cards like candy in a parade at least they did when I was in. And yes there are lot's of "Dumbass Hack's" who know someone high up who got them in and keep them there in all of the other Union's...
When I got in local 73 I bypassed the hall and applied at a Union shop. I did a skill's test for them as I had 7 years non union experience out of highschool in that field. They signed me as pre-apprentice for 60 days and paid me 80% of Journeyman Scale. After the 60 days period they saw my skill/knowledge and signed me @4th year & 6 months after that I was running circles around damn near all their top guys so they bumped my pay to Journeyman scale as they didn't want me to leave and wanted me to run jobsites. So I called my Business Agent and told him the situation and he wanted me to have my Journeyman's Card and pay journeyman dues vs. 4th years dues... Played out just like I wanted it to as I knew that I wanted my Journeyman's Card so I could leave and go to any shop without having loose rank/pay if there was a layoff in winter so I was happy to pay a little bit more in dues. Been out for a number of years but might make a phone call to get back in and it would be a simple phone call because now my old B.A. is the President of the Union and would easily remember me.
Which trade ?
Also, I simply signed up for 134. Turned in all the paperwork. Took the 400 question test, and got a nice piece of mail a few weeks later. Just gotta be very good at math