Sara's Galapagos and cross pollinating

[Douglas_OW]

I plan on growing Sara's Galapagos next season and have some questions about crossing. I read the writeups, at GW and elsewhere, about this issue, but I'm not sure that I understand it properly. I have read that Sara's Galapagos have exerted stigmas that can be a problem in terms of cross-pollination. Which of these possibilities is something that I should be concerned about if I want to save pure seeds:
A. Don't plant them near other tomatoes since they might serve as a source of foreign pollen in terms of cross-pollination. This would be a problem for me because I plan on growing many other tomatoes. I wasn't planning on bagging all of my tomatoes for seed saving. I would want to isolate the Sara's plant as much as possible.
B. Regular tomatoes nearby may lead to cross-pollinating currant type tomatoes. This wouldn't be a particular problem for me. I wouldn't mind bagging some blossoms on the Sara's Galapalos to save some of it's seeds.

Jim