Hi
Two travel options
Eurostar train (best).
Ferry and then car hire or train in France.
Eurostar,
Firstly keeping your luggage imho slows you down there re long lines at disembarkation and you will not be able to walk fast, and will often have to travel down elevators only, not escalators,
DCL is very organized on luggage and ignore reports on the main forum its 100% efficient.
Next, it is very tight.
Ashford is quite doable by Taxi but many people will be after them.
We are supposed to disembark from 8am, if you get luggage etc in say 30 mins, and a taxi you can get there by 9.30am.
I would get the train times from Dover priory station on that morning as well and dependent on when you get a taxi consider routing via that station instead.
The issue is that Eurostar have a strict 30 mins rule, to check you in and your passports etc, so its very tight.
The good news is if you get the direct Eurostar train to MARNE LA VALLEE-CHESSY, the station is under the
Disneyland Paris resort between the parks and the Disney village.
You can also do it in direct via Lille Europe station, and get a TGV train from there. IE Brusells train at Ashford then change and TGV.
More Eurostar options are at Ebbsfleet station further up towards London, from Dover priory.