You have plenty of time!!! RELAX!!
Put your Ps in a huge rubbermaid container before the transfer and set up your air pumps inside. As long as the container is powered by air pumps and inside room temp, you can actually leave the Ps in there overnight. Disassemble your tank without cleaning any of the equipment (filters, gravel, powerhead, decors..etc) so when assembling the new tank, some of the established bacteria would help in cycling the tank in a shorter period of time. Even though you put your tank together again with the same equipment, you should cycle it for 12 hrs just to be on the safe side. Arrange decors, make sure temp is right, check all water perimeters.. add fish!!
Seems like alot of work, but its really simple..