@Cinnamoncupcake when you respond to the draft, you should state your preferred placement for September as well as now.
If your preference is the local primary school, ignore the HT. The LA is responsible for provision detailed, specified and quantified in F, which is what 1:1 should be if it is reasonably required (and if it is required but isn’t in there, you will need to appeal whatever school is named), and that includes ensuring there is sufficient funding to actually provide the provision. EHCPs can be fully funded, but LAs don’t do this unless forced. If the school needs more funding, they should approach the LA.
Once DD is compulsory school age, transport is possible. Sometimes LAs will try to refuse if they believe there is a closer school suitable, but it is possible to challenge this. This SENTAS article explains more. Before DD becomes compulsory school age, things can be more difficult. There isn’t a duty to provide transport, but they have the discretion to provide it and you can argue the provision of transport is necessary to facilitate DD’s attendance at the school named in section I of the EHCP. If you have to appeal, Gavin at SENTAS is helpful.
If you state 2 preferences, a MS and SS, it is overwhelmingly likely the LA will state a MS (whether it is the one you stated or not), so if your preference is SS, you don’t have to state a MS and personally I wouldn’t.