Either foil later in the cook, don't foil at all or you can try foiling as usual, coolering as usual and then putting back on the grates to firm up after a long rest in the cooler..
Lonestar 24" Vertical offset w/ Insulated Firebox & Performer Platinum
Former owner: Jambo Backyard, Klose BYC, Med. Spicewine, Pitts & Spitts, XL & (2) Med. BGE's, 22" WSM & (2) 18" WSM's, 18" & 22" Weber Kettles