You can camp near base camp area and have to take permission from the GMVN authority as its not safe to camp alone there.
or you can stay there in base camp they provide you all the camping facilities.
Start with Jammu and visit Vaishno Devi and post that you should book taxi to Kashmir, coz if you will start from Kashmir there u have less options of cabs.
For Kedarnath, you can directly go there and ask people around for a stay.
For Chopta as well, there are homestays there. Hotels are less since there is no network and they are hard to find online. There is this Moksha cafe for bikers just before Chopta.
March to may if you want to run away from heat.november to Feb if you want to see natural beauty or snow.june to October if you are on low budget.where are you from
We are two people on two bikes...travelling from Delhi to Munsiyari..2nd week of December..if you would like to join, we can plan to meet you on the way....