"Gert thee a brass cabin ook, boi" ..or a cheapo clasp from a poundstore ironmongery type place to shutter it instead of "tha" string.
I get where you are coming from, the wine cooler is a first foray into smoking & curing, offers basic weather-proofing & room for expansion should you need it, ..plus a place to balance the odd tray / plate of smoked schmutter, & the wood et al is left over from another job, makes perfect sense & offsets the cost (in argument terms of budgetary spend for your new hobby) .., can just imagine your other half on the phone, ..."what the hell does he want with a big bag of sawdust, oh well, keeps him quiet" #been there worn out the t-shirt (haven't we all)!?
You "might" want a flip up tray table on one side to save you juggling ...speaking from experience (or drag a thrown away gas bbq with table arms & cobble them on the sides, invariable they are plastic with metal supports, but are weatherproof & durable, a saw, drill & some screws ...sorted.
Plenty to be scavenged on freecycle / the local tip,
"Good Work Fella" *
*is of the "loaded" generation.