I've made one month long cross-countries twice in a pop-up, the most recent last July. Rolled the dice and made plenty same day reservations in route but National Parks require planning. We did 4 days in Yellowstone but booking about this time for July, we had to do midweek, no hookups. Yosemite would have been a no deal. CA coast ditto. All depends on where you want to go on how long you need to plan/make reservations. We stayed outside Yellowstone as a walk-up the first night because we'd had a blow-out and were behind schedule but only got that spot because our pop-up was small. I definitely agree that a small rig makes it easier to flex. I have teenagers now so setting up a PUP isn't a big deal. Wouldn't want to do that with small kids but agree the hybrid is worth considering because of size and tow vehicle requirements.
