Which hotels are in walking distance to park enterance?

Hilton Universal Los Angeles

Hilton Hotel Universal City is .2 miles, Sheraton Universal Hotel is .3 miles and the BLVD Hotel & Spa Studio City is .7 miles. All doable if you're going to walk.

If you want a cheaper hotel there's one just West of the 7/11 near Vineland; same side of the street as the 7/11. I don't know what you consider walking distance but it's walking distance to me and one of the cheapest hotels in town. Too short to even bother waiting for a bus - the ride would be about thirty seconds. BTW, there is no "ART transit system" in LA + what the hell does that even have to do with the original question?

Unknown. HOWEVER the ART transit system is great. Goes to all the hotels and parks.

Hilton Universal LA