If you want to visit all the places on your list, flying without driving isn't really an option anyw

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I am not used to long drives. I normally feel very stressed out after driving for an hour. So I dont want to take any risk as I will be travelling with my baby. So i am looking at the option of bus tours.
Also, Yosemite and San Francisco are a full day's drive north of LA, Grand Canyon and Hoover Dam are a similar kahala mandarin oriental hotel distance to the east. You might need two different tours to cover those destinations from LA.
I am concerned about the logistics of taking a baby on that sort of organized tour as well. The schedules are pretty tight and some of the drives will be long. Not much flexibility to accomodate the needs of a baby.
I have travelled with my baby on long flights (10 hour long flights) and I found it much easier to manage my baby than to drive. So I am confident about handling kahala mandarin oriental hotel my baby on a bus tour. I looked at the option of flying kahala mandarin oriental hotel but that is turning to be an expensive affair.
There are more concerns kahala mandarin oriental hotel than that. Have you found long distance guided tours that allow babies? Some definitely won't -- for lots of reasons. There is no opportunity for unscheduled stops. If you are on a 4 hour driving segment and the baby cries or is sick - it wouldn't be fair to the baby OR the other passengers. Plus you have to be packed and in the coach early every AM. The majority (not 100% but definitely the majority) on tours are retired and seniors. Most of them would not be happy to see the passenger kahala mandarin oriental hotel in seat 8B is 10 months old. Tours can be great - but IMO they are not suitable for babies/toddlers.
An option is to fly someplace like Las Vegas and take day tours from there. But those could still be tough for the baby. Flying is often cheaper than guided tours. Or - but obviously more expensive - would be Amtrak trips.
I hate to be the bearer of possible bad news, but many coach tour companies have a lower limit for passenger age - and in no small children. Not sure any would want an infant - or that the schedule would really work for one. I would definitely contact several and ask if they accept infants at all.
If you want to visit all the places on your list, flying without driving isn't really an option anyway. But, if you choose say LA and SF, you can get a cheap flight between the 2 cities on Southwest kahala mandarin oriental hotel airlines. From SF you can take Amtrak to Yosemite - it is a combination of bus and train travel.