Steve, Thanks for posting your experiences. I also have continued my practice in isolation - I spent 4 days last fall in FFld and domes, but other than that, I've done program alone since mid eighties.
I also continue the siddhi program - I view the siddhis as a selection of possible appreciations of properties, appreciation of qualities from the transcendent - the particular abilities or perfections are not significant in themselves - but culturing the ability to appreciate an abstract quality (such as friendliness) - cultures the ability to appreciate any 'thing' from the Self . . . my siddhi practice extends to almost my every waking moment - everything is a flavor of Self - the TM-siddhi practice is with eyes closed - but samyama is for seeing, samyama is for living. If the person sitting next to me on the bus only knew - I see Self in their hands - feeling a tad guilty I look away - aluminum sizzles with Self - I honestly wonder, how did I get there - I look up and see Self get on the bus, how can that be? . . . maybe I should have scraped the mold off my bagel this morning :) Jai Guru Dev