Just thought I would let you all know that I am now back from the US and the RV trip was great, thank you all for your help and advice.
As most of you mentioned I was trying to do an awful lot in a real short space of time and you certainly weren't wrong, here is a brief run down of how things went, for anyone who is interested.
Lake Tahoe was amazing and I was a bit disappointed that I didn't allow my self more time there, as I would have loved to have driven around the whole lake but there was a cycle race on and I turned around part way in as every corner had a cyclist and it wasn't much fun for them or me.
I never actually got to drive Tioga pass as my sat nave sent me up Highway 4 and to be totally honest I found that such a scary drive, I am not great with heights, that I didn't want to drive down Tioga Pass a couple of days later so I changed my route to stay on the west of the mountains as the roads seemed a little easier.
On the plus side I did get to see Kings Canyon and Seqotia, before heading to Vegas. I missed out Death Valley and Grand Canyon but did see the Grand Canyon by helicopter on a flight from Vegas, which I am told is one of the best ways to see it. We took in the Hoover Dam (amazing) and dropped down to Lake Havasu city before heading to LA through Joshua Tree park, which I thought was a really nice National Park.
LA is absolutely crazy with traffic, as I was warned, it took us 4hrs to get from 40 miles east of the city to Highway 1, there was an accident but even so every road we tried was absolutely rammed.
Highway 1 was fantastic and we stopped at Big Sur which was gorgeous, I wished I had allowed myself another day there, we then headed in to San Francisco for a couple of days, that's a beautiful city.
So as I mentioned I am back and now clear of jet lag and have started planning next years trip and would welcome any advice you could give, I have three potential ideas but would welcome any others, if you have them.
1. Into Seattle, or similar, and tour Yellowstone and surrounding parks
2. East coast maybe starting in New York and up to Niagra Falls, after that who knows?
3. Back to Canada, which I did last year, and maybe take in Victoria and a ferry up to Prince George area, has anyone done this? (I know this is technically in the wrong area)
I would be looking to cut the mileage back to about 800 miles per week and either do 2 or 3 weeks, as mentioned any advice would be welcome.
Thanks
Gary