Don't forget duct tape and electrical tape. Bailing wire can come in handy too. When my RV was new my hydraulic unit for the slides broke off and was hanging by the hydraulic lines. Whomever did the welding at the factory didn't do a good job that day. Luckily I had a heavy ratchet type tie down strap and I was able to use the strap to secure it back up to the frame to get it to the dealer to repair it.
Figure out how to manually retract your slides. My can be done with a ratchet wrench so I made sure I had the correct size socket and wrench just for that.