Echoing the point of the club's that have been relegated or changed locations...I would have notched up more too.
Donny, Chesterfield (been to both their grounds), Barnet - likewise, Chester, York, Gateshead, Maidstone, Boston, Brisbane Road was always a favourite of mine too. The Dell - for that famous 2-2 draw. The Shay.....replace the 'y' with a very common constanant....Never been to Forest as Lincoln haven't played there...so why should I.
The best away ground I have been to, though, was Craven Cottage.....but that was for personal reasons....
Yes old Donny, old Rotherham (plus that athletics track), old Orient, Maine road, old West ham, the Dell (didn't manage all the game though thanks to local constabulary!),
Other old ones with Lincoln:
Brighton (all of them), Cardiff, Huddersfield, Leicester, Bolton, Derby, Hull, Milwall, Reading, Swansea (DREADFUL DAY), Wigan, Oxford, Scunny of course, Shrewsbury, Walsall, Wimbledon, Wycombe, Colchester, MK Dons hockey one, Morecambe? Newport (with our 2 keepers playing!), Northampton (away end was cobblers), Yeovil, Barnet, Chesterfield, Maidstone, Chester, Darlington, Wealdstone, Kettering, Northwich (two of them), Fisher...
That's all I've got in my list, not sure if been to any others that have now gone.
Quite amazing turn around of new stadia in the last 20/30 years or so.
We may see Grimsby move yet (they desperately need to!) And of course ourselves possibly.