You inflate the boat to pressure, then use a ratchet strap at intervals to keep it secure, but dont over-tighten. You can use wooden planks or strips to spread the load. You're using a contact adhesive so shouldn't need as much pressure as you think.
On hypalon boats, the rubber stake needs a thin coat of PVC adhesive first to go off, then 2 coats of hypalon adhesive as normal. All instructions on Polymarine's site. Prepare area first and degrease, etc.
If you run out of straps, Gorilla tape is a good alternative. It might leave glue residue when you remove if left 24 hours. Methylated spirit or petrol on a damp cloth will remove, then wash area.
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