This is my 3rd year where we stayed as a large group (8 this year, 10 previous). It has become our home base for our 7 days in April. El Cajon is located NE of the San Diego airport, about a 40 minute drive. Be prepared for a big of hassling if you are renting a vehicle. You take a shuttle bus from the airport to the rental site and then line up at the counter. You really need to shop around and compare prices. We've used Dollar, Budget, and Fox and went with the lowest rate each year. Vehicles and counter service seemed to be the same quality.
We use the Stay and Unlimited Play every 2nd day. Power carts are included but both Oak Glen and Willow Glen are walkable. We like to walk in the morning and cart in the afternoon. Bring a sweater or vest as it's cool in the morning but quickly warms up by 11 AM. On alternate days we visit other golf courses - Steele Canyon, Barona, Salt Creek. These are link style courses that require a power cart since many holes have extreme elevation changes. A nice variation from the relatively flat Sycuan courses. At Sycuan you can buy a practice range golf ball card for the week and there is a great short game area and several putting greens.
The staff, in particular, Veronica and Virginia in the restaurant and Jan in the bar lounge are always smiling and congenial. As hockey fans from Canada, we have our restaurant dinner in the bar where we can gather around a large TV screen and watch the NHL playoffs. Other reviews about the renovated rooms are accurate - large, clean, comfortable.
If there was one thing they could improve it's the WiFi connection. No free service but a 24-hr $9.99 fee provided by Ethostream. If you are coming from, Canada the roaming charges are ridiculous so be sure to take out a temporary US data plan before leaving.