DNSCrypt is useless. Yeah, they can't see that you did a DNS A record lookup for www.example.com, but they can still see your subsequent TCP connection to the IP you received in your encrypted DNS response, and see the HTTP Host header that your browser sends. Even if it's a HTTPS connection, modern browsers leak the hostname then too, due to SNI.

Signing DNS responses has much more value than encrypting them.

If you set up DNSCrypt with OpenDNS, you're not improving the situation. You're just adding an additional third party that can see what you're doing.