I don't have a sequence nor did I stay in a Holiday Inn express but I'll assume it's a gravity toilet. There are porcelain models in various brands, Dometic, Thetford and some others you can search. Most will give the dimensions required for installation. Personally I'd recommend the Dometic 310 or 320 elongated models if the space is there. I like the bowl shape and water flushing design. Replacement is straight forward. Turn off water supply, get towels to mop up spillage. Disconnect water supply to toilet. Remove the 2 bolts/nuts that hold toilet to flange on floor. Use a new sealing ring. Residential typically use a wax ring. Dometic uses a rubber ring they are proud of $$$. Set toilet in place, bolt down, arch water and check for leaks.
Hint drain and flush your black tank BEFORE you remove the toilet. The open hole to the black tank is going to stink some but flushing can reduce it some. Or if the fine odor of poop turns your on, disregard the cleaning.
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