DP and I are getting married next year. We're not planning on having a huge wedding or doing the whole gift list thing though we've already had queries as to what sort of thing we'd have on our 'gift list' 
Would it be unreasonable of us to ask people to contribute to a lifetime National Trust membership for us if they want to give us anything? It's something we'd love and would hugely benefit us in the future when we have children (and before we have children to of course). Or would it be grabby to ask for money towards something? I know that paying towards the honeymoon is a big thing these days, my sister did it, but as we're likely going to be camping in Devon for our honeymoon that's not one that we'd need help with particularly!