Don't forget good, wicking, arch supporting socks! We use Smartwool -- no blisters! Bring moleskin, blister bandaids/plasters, body glide, arnica, etc. (Or you can purchase these once you arrive and before your start your park days.) Better safe than sorry. All the walking and standing over a multi day trip at DLR will put more stress than normal on your feet, so it helps to prevent sore spots and blisters, and to treat them asap if you get any. Some people like to soak their feet in epsom salts at the end of each day. I haven't tried this trick yet, but I've heard that it can be very helpful. (There are at least 2 drug stores very close to the parks, should you need first aid supplies during your visit. But hopefully you will not need any!)