Well now I'm REALLY excited!
I thought we might like St.P better than Moscow also (plus Moscow on weekday nights is INSANELY expensive for hotels in the central district) so we're spending 4 nights and 3 days in Moscow, and 5 nights and 4 days in St.P (plus the evening we arrive in Moscow and the day that we arrive in St. P by train).
We had planned to do the overnight train ride, then we kind of aghast at the prices for a 2 person sleeper coach. Wow! Once we started thinking about it, we realized that to get on a train that leaves at midnight and arrives at 7 a.m. would leave us not much time for sleeping and no time to enjoy the ambience of the train.....and I am a person that enjoys my good night sleep. So my teen son suggested we instead get a good night sleep (and hot shower!) in our hotel in Moscow, then leave on the 6:30 a.m. train instead. That sounded like a much better (and cheaper, even considering the hotel room) idea, once again proving my kids are smarter than I am.
We have plans to visit Tsarkoye Selo outside StP. Unfortunately, going there at the end of March/beginning of April (which I have been told is practically the WORST time to visit, weather-wise) it means that the Golden Ring towns won't be a good idea (which is OK, we're short on time anyway), but I'm sad that the fountains won't be working at Peterhof. Many people have told me to not even go to Peterhof at this time of year, since without the fountains and gardens it's better to visit Tsarkoye Selo. Thoughts?
Yes, you're right that having half the family on the Appalachian Trail (in the Smokey Mtn segment, no less) and the other half in Russia is a bit dicey. But oh well, my son is a junior in high school and visiting Russia was top on his list, so it was either now or never.
Fortunately my husband and younger son will be hiking with their boy scout troop (getting ready for Philmont in the summer) so they will have plenty of support if they run into any problems. And this is the first time EVER that I actually bought travel insurance...and looked it over VERY carefully in all the details. I'm actually more worried that something should happen to ME while in Russia (better not step out in front of busses!) and my son will be having to handle things for the both of us in a foreign country. But I guess that's how they learn,right? But we have back-up after back-up of adults back home (other than dad who will be unreachable) with all the documentation to cover any and all contingencies!