Having shore power even part time really requires regulated LEDs. However if your rig never gets plugged in, the cheap LEDs are wonderful.
The only time our trailer gets plugged in is if we need to charge via generator. Both it and the solar will raise the voltage up but only during the day. By the time we use the LEDs, the batteries voltage will have dropped and slightly above 13v is the most our LEDs ever see. I do keep some incandescent bulbs in the drawer for the rare instance we would use a campground.