Sequoia National Park 33 foot Travel Trailer

Is there any campgrounds in the NP that I can fit into in Mid-May???

Interesting question. Be sure to ask when making a reservation if the site length is for the trailer only or for both the tow vehicle and trailer. If it is just for the trailer you might be able to park off site with the tow vehicle. Most national parks do not easily accommodate 65 feet overall length rigs. I second parking outside the park and just driving in without the trailer.