hey hey kwg
agree with Judy about self guided tour to do on your own
guruwalk.com/ reims
they offer a guided tour of cathedral and a self guided tour
thecrazytourist.com
15 best things to do in reims
a-l-allure-champenoise.fr
the website has changed a bit, husband & wife (she speaks english he doesn't). in two 2CV cars. (there was 4 of us) met us back side of cathedral, tour around small city, out into countryside small villages, stopping at vineyards & local private winery to sample, then back to reims (was about 4-5 hours) had a bite to eat, loved the little gift shop, went to cafedupalais.fr for a flight of local champagnes & dessert. walk back to train and on our return to paris. fun day
you can email the company above to see if they will do a tour what you want/wish for and cost
another idea we have done in other cities is at taxi stops we asked if driver was willing to take us on a tour around the area showing/telling us the history, architecture, parks & gardens. confirmed cost and length of tour first (we gave good tip) and off we went. everyone has their own opinions to agree or disagree, we know what we liked and wanted may be different than others.
whatever you decide go have fun and enjoy
aloha