If your combined vehicle length exceeds 40 ft, you will need to research the specific campground's maximum limit before arriving, because even popular locations like Yellowstone’s Madison Campground or Fishing Bridge RV Campground enforce strict boundaries.
Understanding Your Vehicle Dimensions is Non-Negotiable for National Park Camping.
When planning a trip involving multiple recreational vehicles, you must treat the combined length—motorhome plus towed vehicle, or truck plus trailer—as a single unit when checking campground rules. It’s not enough to know that your Class A motorhome is large; the local park authority cares only about the total footprint you are going to occupy. For example, while Yellowstone National Park has high-traffic spots like Madison Campground and Fishing Bridge RV Campground with a typical published maximum combined vehicle length of 40 ft (as of 2026), other destinations enforce far tighter rules.
The discrepancy between these limits shows how critical pre-planning is. In Olympic National Park, while the limit at Kalaloch Campground for a combined vehicle length is 35 ft (as of 2026), you must be acutely aware that Heart o’ th