Hemet, CA to Klamath River RV Park, CA

I looked at the 5/20/101 suggested routes.

It appears to avoid most traffic-congested areas.

If I read map correctly, it appears the 5 connects with 20 at Williams and then the 20 heads west and hugs Clear Lake nearly half way around and then continues to Capella where it connects to 101.

Is the Hwy that hugs and goes around Clear Lake suitable for towing a trailer?

Below are stops that I pegged for getting to Klamath.
Any suggestions about where to stay (full hook ups) in/near these suggested cities Kettleman City and Clear Lake?

If we take three days to get to Klamath, it looks like our overnight stays are near these locations (300 mile driving days):

1. Stop 1 - (approx. 300 miles from home) is around Kettleman City (found Almond Tree Oasis RV Park that is in Coalinga and not too far from FWY.)

2. Stop 2 - 3Approx. 300 miles from stop 1 is Clear Lake

From Clear Lake to Klamath (our destination) is 260 miles.

Thanks!