If you are planing to go privately to Moscow you should have in mind that duing high demand periods the hotel rooms are bloody expensive. 300 USD+ are normal for a singel room per night. High demond periods are:
1) Super High Demand Periods
Feb 13-17 ProdExpo
Mar 20-24 MITT
Apr 03-07 Mosbuild
May 10-13 Telecommunication
Jun 19-23 Oil & Gas
Sep 25-29 WorldFood
Oct 09-13 AgroProdMash
Nov 21-25 Furniture
2) High Demand Periods
Jan 16-20 ConsumExpo
Jun 05-09 Few small exhibition in one period
Jul 01-04 WorldHair
Sep 05-09 AutoSalon, ConsumExpo
Sep 11-15 BuildIndustry
Oct 02-06 Oil & Gas Conference and Exhibition
1) Super High Demand Periods
Feb 13-17 ProdExpo
Mar 20-24 MITT
Apr 03-07 Mosbuild
May 10-13 Telecommunication
Jun 19-23 Oil & Gas
Sep 25-29 WorldFood
Oct 09-13 AgroProdMash
Nov 21-25 Furniture
2) High Demand Periods
Jan 16-20 ConsumExpo
Jun 05-09 Few small exhibition in one period
Jul 01-04 WorldHair
Sep 05-09 AutoSalon, ConsumExpo
Sep 11-15 BuildIndustry
Oct 02-06 Oil & Gas Conference and Exhibition