Just outside Vancouver here. Got two, the 454SS I bought in 2000, just grabbed a beater 2WD with a 305 about 6 weeks ago that one been fixing up for doing light jobs.
I wasn't worried about heat. It had more to do with OCD in my case :)
I'm an industrial electrician by trade, I didn't like the idea of getting around the problem with a resistor. The relays, fuse holder and wire were relatively cheap with the main benefit of the circuit behaving the same way...
I just did all the exterior lights on my '92. Swapped the flasher relay for one that works with LEDs and everything worked out great ... until I got to the corner marker bulbs. They would work fine with the running lights off but all the lights would go solid as soon as you put the running...