Greg, if you're talking about Russia, unfortunately I can't afford such a trip, but lots of power to ya!! This would be the ultimate DD, particularly if you actually get to talk to the folks like Malyshev, Sozina, etc. and be able to report back your impressions.
Another that I sure would like to meet and perhaps have a cup of coffee with is Stratton Stevens - and that's not nearly as far as Moscow (Montreal). Stevens in effect staked his fine reputation in being associated with Malyshev - would sure like to get his views, in view of events the past 5 or 6 months.
I say go for it (but make sure you'll be able to see them first - would hate to have you waste your money and time and come back empty-handed).