My parents have a portacot, highchair, toys, wipes and a bouncer and playmat when they were little. We only live 4 min drive away but it was great! They all got used, we're there 2-3 times a week and both the highchair & portacot get used every time!
My mum and dad both have car seat in their cars (or there to go in there car if needed) which is handy for us as they do the off daycare pick up/drop off.
I think it's a lovely idea and I know I appreciate it :-)
My inlaws, who live interstate and have a highchair & porta cot... God send! And always have baby bath wash/ shampoo for us to use when we go there so I don't have to take that :-)