We just returned from a trip to Yellowstone in our 37' Class A MH. There are several campgrounds that will accomodate your rig (though not all).
Fishing Bridge is the only campground with full hook-ups. See the list below for all of the campgrounds in the park.
In order of openingDates*Nightly Fee/**SitesElev (ft)
$2085 6,200A,F,GMost are pull-through
ΔΩ5/3-10/20$212786,800A,F,NS,DS,GCall for availability & reservations
Fishing Bridge RV
Call for availability & reservations
5/17-9/30$20>1007,500A,F,G2 @ 50' (signed); 5 @30'
5/24-9/30$15316,600 VAll @ 30' or less; has hairpin curve
ΔΩ5/24-9/2$214327,800A,F,NS,DS,GCall for availability & reservationsCanyon
ΔΩ5/31-9/8$25.502737,900A,F,S/L,DS,Gcall for availability & reservations
6/14-9/9$15757,300A, V10@ 35'; 35@30'-pull-throughPebble
6,900VSome long pull-throughsSlough
6/15-10/31$15236,250V14 @ 30', walk through first to assess sitesLewis Lake
6/15-11/3$15857,800VAll @ 25' or less
ΔΩ6/21-9/22$25.504307,800A,F,S/L,2S,DS,GCall for availability & reservations*Campgrounds close for the season at 11 am of the last date listedΔ
Sites you can reserveΩ
Rate does not include tax or utility pass-through‡
Site with full hook upsA
Accessible sites availableF
Pay showers/laundry onsiteNS
Showers not included2S
Two showers included each nightDS
Generators OK 8 am-8pm