I've seen many a small Class C in a hotel/motel parking lot over the years.
The wife and I have made a couple trips where we needed to be somewhere at a certain time - and did not look for a campground. We just parked the truck and trailer on the far corner of the hotel/model lot.
Never had any problems. But I have passed up a couple because I thought getting in and out would not be easy - I'm 58 feet long with truck, hitch and trailer. Always found another close by where I could fit in.
A 25 foot Class C is only three feet longer than my pickup truck. Usually never have trouble anywhere - though I do prefer a parking spot where I don't have to backup to leave. Either a pullthru in the middle of a parking lot or I back into a curbside spot.
You shouldn't have any trouble. Just remember you are driving a bigger than normal vehicle.