I too would be interested to read about other's 'experiences' of footplate experiences on preserved lines - it's a big birthday year for me this year and I'm considering asking for my present from my family to be a day on the footplate, but having trawled many lines right across the country I was slightly put off -- not by the price -- by the number of 'fellow' footplaters there would be sharing the experience with me!
I whittled down a long list to two narrow gauge lines -- the Talyllyn and Welshpool & Llanfair -- based on price, length of journey/interest, being able to have my family travelling in a carriage behind, and going solo (with the crew) on the footplate.
Beamish and Foxfield also seemed to me to offer good value solo experiences, both of which also appeal to me for their industrial railway locations.
I've had a couple of footplate rides in the past, and on both occasions I was not met with the friendliest of crews, who more or less ignored me! So this also makes me slightly wary, I'd like a crew who at least talked to me as part of the 'big day' even if for them it is all fairly routine.
Anyhow, any suggestions/recommendations would be welcome - I haven't booked anything yet... I'm easy about whether it's diesel or steam, big stuff or little - as long as it's a memorable occasion and my family are part of the day too.
cheers,
Keith