Saving beans for seed

[beckydore]

This year I took part in the 3 sisters and tom seed swap and as a result had quite a few different varieties of beans.
Unfortunately my Dad has been ill and I've had hardly any time this summer to go down the plot.
As I didn't get round to picking the beans at the time, I left them to go to seed, which I have now collected. I have a bag of mixed beans but not sure what type they are.
1. Do bean seeds grow true if they have been growing near to others? I had about 10 varieties in 3 different beds. Do I need to be worried about taking pot luck on planting them next year?
2. What is the best way to keep them for next year?
Becky

[beckydore]

[Vortex]

If they're runner beans then they will have crossed with each other, unless the varieties are more than 100 feet apart or have a substantial obstical between them.
French beans generally don't cross and don't cross between dwarf and climbing varities or with runner beans.

[saddad]

Do you still know which one is which?  :-\

[manicscousers]

I stick mine in envelopes in my seed box, still got some haricots from last year  ;D