Felton requires travel on Hwy 9 which is 1 lane in each direction. I would not recommend staying in Felton if you like sunshine. Drive time to Great America is going to be double that of coming from Morgan Hill area and traveling on Hwy 101.
Hwy 17 has some of the worst traffic congestion of any highway in the area and it is bad on weekdays and on weekends. And from the Santa Cruz and Felton area if there is a problem on Hwy 17 there is no alternative route you can take. I avoid this area with a car and an RV would be even less fun.