My ISP hands out /64 ipv6... Unfortunately it's dynamic and changed often. Pretty much a completely broken implementation. Luckily ipv4 is behind a double NAT, so absolutely no way to setup any sort of port forwarding. Was wanting to setup ipv6 on my home network but wasn't sure how easy it'd be to work around a constantly changing ip range.
I don't know that I'd call their IPv6 broken. It's certainly the minimal offering. It kinda sucks that they're always changing up the subnet address, but that's not really an issue if all you need is for your nodes to be set up with IPv6 addressing.
If you're looking to access a LAN node from the outside via IPv6, a dynamic DNS setup should work. A quick search on "dynamic dns provider ipv6" brings up a number of results (none of which I personally have any experience with). Just make sure your firewall is properly set up.