Honestly the only full proof way of connecting anything is with solder. Taps, butt splices and all that nonsense can give you issues down the road. When I do use butt splices I heat shrink the heck out of the connections to hold the wires tight into the splice.
When I did resistors on my Wife's Camaro I used a thermal epoxy to fix them to the body to aid in heat dissipation and soldered/heatshrunk all the connections.
For my truck I think I will give the aftermarket tails a shot. I can't tell whether I like them or not from the pics I've seen. At least they are full LED and include resistor boxes.
2016 GMC Canyon SLT Cyber Grey, 4" MaxTrac lift with 2" RC level kit, LED's throughout, Iron Cross steps, Line-X, Stubby Jr, GMC All Weather floor mats, Bull Rings x9, DRL harness, OPT7 LED lows and fogs