Really wouldn't be worth it in my opinion. Your tolerance will be highest then so I'd imagine you'd need more than 2x as much - why not wait and just get 2 more trips from it? I understand wanting to trip often, as I have been lately, however in my opinion the very minimum between trips (aside from special occasions) should be 3 days - and even that will quickly build up tolerance. Ideally wait a week before your next trip.
However, if you must, take around 2-2.5x as much. Maybe even 3x.