If you have SkyPriority, find that checkin area on the extreme far right as you enter T4. The checkin area is a bit hidden, but the huge SkyPriority signs are very visible.

There is an airside shuttle bus between T4 and T2 and you'll pass near the shuttle gate on your way to the SkyClub™. Check it out ahead of time and ask the agent how often the bus is running. Then, allow some time--T4 is a long walk. The SkyClub is near B30-B32 and it's worth a visit.