Has anyone tried those heated camping chairs? I just saw one online and had no idea they existed! I’m always freezing around the campfire, especially late in the season, and this seems like a total game-changer. Are they comfy and worth bringing on trips, or more of a gimmick? How long does the battery actually last when you’re out for a weekend? Also, are they bulky/heavy to carry? Would love to hear any personal experiences or recommendations-very tempted to grab one for early spring hikes!