We lived in Estes 8 years, leaving in 2002. The RV parks used to be quite good but have just continued to go downhill in our personal and input estimation. We will not stay there anymore. Last time we stayed at Riverview in Loveland but they suffered severe damage in the last flood and still recovering as far as I know. If you were to stay in Estes I would imagine Elk Meadow and Spruce would be the best choices.
Don't count on getting an email and, now with the busy season here they most likely will not be the most pleasant on the phone either.
Good luck.