KHS Town and Country 100 & Jamis Durango Femme 1.0
I have the Marathon Plus in 26 X 1.75 and use regular tubes for the size. So far, so fabulous. No flats and part of my ride on Sunday involved lots of broken glass along a stretch of park road. Excellent stuff, those Marathons.
Lemond Chambery/Cannondale R-900/Trek 8000 MTB/Burley Duet tandem
Looks like they have 700 x 28-32's at REI stores. If anything, use the 35's, if anything, less expansion may increas tube thickness. Size isn't that big a deal if you're going up in that small of an increment.